JOS, Nigeria — A bungled bomb killed three people, including a suicide bomber, on Saturday night, a police official said, four days after twin car bombs blamed on Islamic extremists killed at least 130 people in the central city on Tuesday.

The senior police official said the bomber dropped a bag holding explosives at an outdoor theater crowded with people watching a European soccer cup final. He said the bomber and two others died.

There were no immediate claims of responsibility.

But the Islamic extremist group Boko Haram, which has been threatening to sell nearly 300 abducted schoolgirls into slavery, has been waging a two-pronged campaign of urban bombings and rural attacks.

Separate attacks in April killed about 100 people in Abuja, and a car bomb killed at least 24 people Monday.