WASHINGTON — A former top diplomat in Libya on Wednesday delivered a riveting minute-by-minute account of the chaotic events during the deadly assault on the U.S. diplomatic mission in Benghazi last September, with a 2 a.m. call from Secretary of State Hillary Rodham Clinton and confusion about the fate of U.S. Ambassador Chris Stevens.

In a slow, halting and sometimes emotional voice, Gregory Hicks, the deputy chief of mission who was in Tripoli, described for a House committee how a routine day on Sept. 11, 2012, quickly devolved as insurgents launched two nighttime attacks on the facility in eastern Libya, killing Stevens and three other Americans.

The hours-long hearing produced no major revelation while reviving disputes over the widely debunked comments made by U.N. Ambassador Susan Rice five days after the attacks and the inability of the U.S. military to respond quickly.

“I don’t think there’s a smoking gun today. I don’t think there’s a lukewarm slingshot,” said Rep. Mark Pocan, D-Wis.

The session exposed bitter partisan divisions as Republicans who are pressing ahead with the investigation eight months after the attacks insist the Obama administration is covering up information and Democrats claim Republicans are politicizing a national security issue.

A scathing independent review in December faulted the State Department for inadequate security at the mission, but it has not been the final word. .

In a jam-packed hearing room where Republicans and Democrats furiously traded charges, the soft-spoken Hicks presented a lengthy recollection of the events and expressed frustration with a military that he argued could have prevented the second attack.

Hicks and two other State Department witnesses criticized the review conducted by former top diplomat Thomas Pickering and retired Gen. Mike Mullen, the former chairman of the Joint Chiefs of Staff. Their complaints centered on a report they consider incomplete, with individuals who weren’t interviewed and a focus on the assistant secretary level and lower.

Hicks said he was watching television at his villa in Tripoli when he first got word of the initial attack. He listened to two messages on his cell phone and Stevens’ chilling words.

“Greg, we’re under attack,” the ambassador said.

Hicks described a series of phone calls to the State Department and Libyan officials, frustrating efforts to find out what was happening in Benghazi, and a call from Clinton.

“Secretary of State Clinton called me along with her senior staff … and she asked me what was going on. And, I briefed her on developments,” he said. “Most of the conversation was about the search for Ambassador Stevens. It was also about what we were going to do with our personnel in Benghazi, and I told her that we would need to evacuate, and that was – she said that was the right thing to do.”

He recalled another phone call from the Libyan prime minister with word that Stevens was dead.

“I think it is the saddest phone call I have ever had in my life,” Hicks said.

Hicks said that shortly after he was told Stevens was dead, unidentified Libyans called Hicks’ staff from the phone that had been with the ambassador that night. These Libyans said Stevens was with them, and U.S. officials should come fetch him, Hicks said. Hicks said he believed Stevens’ body was at a hospital at that point, but he could not be certain.

“We suspected we were being baited into a trap,” Hicks told the committee.

Republicans at the hearing focused on the talking points used by Rice on the Sunday talk shows in which she said the attacks appeared to be associated with demonstrations in Egypt and Libya over an anti-Islam video.

Rep. Trey Gowdy, R-S.C., said Rice’s comments contradicted statements by Libyan leaders and others who called the attacks pre-meditated assaults by terrorists.

Gowdy said Rice’s comments “perpetuated a demonstrably false narrative.” Hicks, asked his reaction to Rice’s remarks on the talk shows, said: “I was stunned. My jaw dropped and I was embarrassed.”

Democrats countered with a video clip of Director of National Intelligence James Clapper telling a Senate panel earlier this year the hit on Rice was unfair.

“She was going on what we were giving her,” Clapper said of the talking points.