Farouk Arnaz – Police believe that Achmad Yosepa Hayat, a possible suspect in Sunday's suicide bombing at a church in Solo, is a member of the hard-line group Jemaah Ansharut Tauhid founded by convicted cleric Abu Bakar Bashir.

"In JAT, he was in the same year with Muhammad Syarif, who blew himself up at the Ad Dzikro Mosque at the Cirebon Metro Police headquarters in April," a source in the National Police told the Jakarta Globe on Monday. "Hayat took an oath administered by Abu Bakar Bashir in Ciamis, [West Java]" he said.

Andi Mulya, chairman of the hard-line Movement Against Illegal Sects and Non-Believers (Gapas) in Cirebon, confirmed that Hayat was a member of the JAT, and said he recognized him from a post-mortem photograph distributed by police.

Andi claimed to have known Hayat through time spent together with the radical Majelis Mujahidin Indonesia group. "But MMI was split up, [branching off] into JAT. Hayat chose to move to JAT but I stayed with MMI," Andi said. On the photograph released by police, he said, "I know that's Hayat."

But Mochammad Achwan, the current JAT leader after Bashir was sentenced to 15 years on terrorism charges in June, denied that Hayat was a member.

"It's the same slander. Police once said Syarif was our member, that was untrue," he told Globe. "Even if any of our members committed that kind of attack, that's beyond the organizational line. But [Hayat] is not our member so we certainly don't take any responsibility," he said.