JAKARTA, Indonesia — It plays out like any ordinary chat between friends on Yahoo Messenger, but the subject matter is chilling: “thekiller” is looking to mesh his Indonesian militant network more deeply with al-Qaida in its Pakistani heartland.

“Come to Pak,” he is told by “SAIF-a,” the Pakistani at the other end. “The seniors say, send one of your boys here to represent your group.”

But beware, “SAIF-a” warns. With the U.S. stepping up its rocket attacks, “the brothers are very worried, in Waziristan all missiles hit very accurately. It means someone inside is involved.”

The exchange appears in transcripts of Internet chat sessions recovered from the computer of 26-year-old Muhammad Jibriel, identified in the documents as the man suspected of using the screen name “thekiller.”

Jibriel, an Indonesian and well-known propagandist for al-Qaida, is currently on trial, accused of helping fund last year’s twin suicide bombings at luxury hotels in his country’s capital, Jakarta. He says the transcripts are fabricated.

The conversations are in a police dossier that provides a rare glimpse into the inner workings of Jemaah Islamiyah, Southeast Asia’s main extremist group, suggesting it and allied networks in the region have more international links than was previously assumed.

Since the chats took place, from mid- to late-2008, a crackdown on Southeast Asian groups has continued, resulting in Jibriel’s arrest and the execution of the man identified in the dossier as one of his most prominent conversationalists.

But the chats refer to others in contact with international extremists, and experts believe such ties likely continue.

“The transcripts are a wake-up call,” said Sidney Jones, a leading international expert on Southeast Asian terror groups. “They show that Indonesian links to Pakistani and Middle Eastern terror groups are real and dangerous, even if limited to a few individuals.”

The 800-page police dossier was given to lawyers and judges involved in Jibriel’s juryless trial but is not part of the indictment. It was obtained by The Associated Press from someone close to Indonesian law enforcement who requested anonymity because the disclosure is sensitive.

Indonesian police declined to discuss the chat sessions or to say whether any Indonesian militants had left for Pakistan since the conversations took place.

The participants talk about sending money and recruits to al-Qaida. They discuss in detail the progress of a credit card fraud involving several Western banks to fund terror activities. They refer to allied militant cells or contacts in Cairo, Saudi Arabia and Iraq.

The man identified as Jibriel reminisces fondly about time spent in Kashmir, where he says he was taught to fire sniper rifles and shoulder-held rockets.

He mentions a trip he made in late 2007 to the Pakistani region of Waziristan where he met with al-Qaida and Taliban leaders, including someone called Abu Bilal al Turki.

TALKING TO BALI BOMBING MASTERMIND

The communications take an extraordinary turn as they’re joined by “istisyhad,” identified in the dossier as Imam Samudra, a mastermind of the 2002 Bali nightclub bombing. At the time of the chats, he was communicating from a death row cell on a smuggled laptop.

At one point, he offers to help Samudra keep in touch with al-Qaida from death row. “If you want to send an e-mail to AQ directly there, I can arrange that,” he writes.

Samudra was executed by firing squad in 2009.

The prosecution is leaning heavily on an e-mail hacked by the FBI at the Indonesians’ request in which Jibriel allegedly asks his brother in Saudi Arabia for money to finance what he claims will be the biggest attack since 9/11, and talks about giving the funds to the organizer. The reference is to the twin hotel attacks, in which seven people died.

Jibriel has claimed the e-mail is fabricated and says the same of the chats.

“The police have made this up,” he said, speaking from a cell before a recent court hearing. “I know about technology, and I know how easy it is to create something on a computer.”

In one conversation with Samudra, “irhaab — 007,” another name allegedly used by Jibriel, dwells on sending recruits to Waziristan, apparently to work with al-Qaida’s media wing.

“I have still got my ‘pass’ to Pakistan, his name is Muhammad Yunus,” he writes. “But the big AQ (al-Qaida) guys here do not agree that everyone should leave. We have to look at our guys and choose, based on their abilities because people there don’t want any hassle.

“At the very least they have to be prepared to stay a long time, 2 or 3 years,” he writes. Both men also talk about being asked to send sums of $1,500 to $2,000 to al-Qaida in Pakistan.

‘IT IS DIFFICULT TO TRUST ANYONE’

Indonesians formed Jemaah Islamiyah after returning home from fighting and training in Afghanistan and Pakistan during the 1980s and 1990s. After 9/11, when al-Qaida began expanding into Southeast Asia, it used those ties to send money and expertise and to recruit volunteers, but it was assumed to have largely given up after the crackdown triggered by the Bali bombings.

Jibriel’s father is an Afghan-trained cleric accused by the U.S. of being a Jemaah Islamiyah leader. In the early 2000s, Jibriel and other Southeast Asians lived in the Pakistani city of Karachi, and some of them were detained on suspicion of having al-Qaida links.

In Karachi, Jibriel attended a boarding school later linked to Lashkar-e-Taiba, the Pakistani militant group accused of being behind the 2007 Mumbai attacks in which 166 people died. The Australian government, which closely watches Indonesian militants, has said the Southeast Asians also attended Lashkar training camps in Pakistani Kashmir when they lived in Karachi.

Returning to Indonesia in 2004, Jibriel set up a well-funded online network with content praising terrorist attacks around the world, as well al-Qaida and Taliban propaganda videos. He also met several times with an AP reporter over the years.

To the AP, Jibriel claimed he knew Khalid Sheik Mohammed, the self-professed 9/11 mastermind. Yet he also revealed a love of Hollywood films and a taste for expensive Western restaurants.

Throughout the chats, participants reveal the ever-present fear of infiltrating spies.

“It is difficult to trust anyone. Many of our men are in jail,” “thekiller” tells “SAIF-a,” adding: “Even the fact a guy has memorized the Quran is no guarantee.”