JERUSALEM, Israel -- A bomb attack in a passenger bus in central Tel Aviv at noon on Wednesday injured at least 16 passengers, two seriously, three moderately and the rest lightly. Paramedics treated numbers of people for hysteria.

Hamas claimed, then denied, responsibility for the bombing, the first terror attack in six years there. News of the bombing sent Gazans celebrating and dancing in the streets.

Police detained then released a suspect in Ramat Gan, while officers at the scene of the bombing have reportedly located a second explosive device on the bus.

Police are now searching for two terrorists, one a female, believed to be somewhere in the Tel Aviv area. Police roadblocks are snarling traffic in the area.

With the terrorists still at large, school children in vicinity of the bombing are not being released at the normal time. 

Initial reports indicated the perpetrator planted the bombs on the bus and fled. Police cleared the streets to pursue the perpetrator.

Ambulances transported injured passengers to Ichilov Hospital nearby. A police helicopter was dispatched to help hunt down the terrorist.