"The recent seizure of weapons in Bhola and continued arrests of JMB (Jamaat-ul-Mujahideen Bangladesh) members throughout the country demonstrates terrorism remains a concern," Moriarty told reporters.
Outlawed JMB, which wants to turn the country into a sharia-based Islamic state, killed about 30 people and wounded 150 in a series of bomb attacks in late 2005, police said.
Security forces seized a cache of arms and explosives and arrested four militants from a madrasa (Islamic religious school) at a village near Bhola district town, 350 km (219 miles) south of the capital Dhaka, in late March.
The raid was conducted as the government suspected that Islamist militants were involved in a mutiny at the Dhaka headquarters of a paramilitary unit in late February.
The February 25-26 mutiny killed nearly 80 people, mostly army officers commanding the paramilitary Bangladesh Rifles (BDR) troops, and raised fears of more violence.
Security forces have since raided several hideouts, seized explosives and detained nearly 200 Islamist militants.
Bangladesh's former prime minister Begum Khaleda Zia told a rally Saturday there were no active Islamist militants in the country, saying her government had routed Islamist groups in a countrywide crackdown when she was in power between 2001-06.
Addressing a May Day rally Friday, Prime Minister Sheikh Hasina blamed Khaleda's government for inaction against Islamist groups.
Source: FOCUS Information Agency
