Indonesian police have stepped up monitoring of militant networks, but see no indication of any security threat to US President Barack Obama's visit next month, the head of the nation's anti-terrorism unit told Reuters. Police have succeeded in killing or capturing a string of suspected militants, including Southeast Asia's most-wanted fugitive, Noordin Mohammad Top, since suicide bombings on luxury Jakarta hotels last July shattered a four-year lull in attacks. Tito Karnavian, head of Indonesia's elite anti-terrorism squad, Detachment 88, said that the threat level was lower, but there was still a risk of new attacks despite the shooting dead of Malaysian-born Top in a police raid last September. “Noordin Top is not the only militant cell within the network. He's just one general, but there are some other generals,” said Karnavian, 45, who was appointed head of Detachment 88 late last year. Trained with Australian and US help, the unit was established after the deadly 2002 Bali bombings carried out by regional militant network Jemaah Islamiah. The nightclub attacks, which killed 202 people, removed any lingerings doubt of the serious danger posed by Islamist radicals in the world's most populous Muslim nation. A string of other attacks in Indonesia since 2000 have been blamed on Jemaah Islamiah, although violent splinter groups such as the one led by Top are now believed to be the key threats. Karnavian said about 300 Indonesians had some form of military capability after being trained in camps in Afghanistan, Pakistan or in the southern Philippines. He said that police had been monitoring militant networks closely, but had found no indication of any plots targeting the US president's March 20