Manila – Two radical Islamic groups that have moved into Indonesia's tsunami-stricken Aceh province aren't likely to attack foreigners or relief workers, but may raise tensions by fostering anti-Western sentiments, said an expert in Manila Thursday.

Sidney Jones, an analyst with the International Crisis Group, said the Indonesian government may have provided support for one of the groups in Aceh, apparently out of fear that foreign military forces and aid workers "have an agenda that is in addition to pure humanitarian relief."

One of the groups, Laskar Mujahidin, is linked to the Indonesian Mujahideen Council (MMI), which is founded by detained cleric Abu Bakar Bashir. The other is the Islamic Defenders Front (FPI).

"[They] seem to have gone to Aceh with some government support, at least the FPI did," Jones told reporters in Manila. "I don't think there's a danger of either of these two groups planning attacks on foreigners or relief workers," she said. "The danger is that they foster anti-Western and anti-Christian sentiments."

The Laskar Mujahidin group, which campaigns for an Islamic state in Indonesia and is fiercely anti-American, has set up four posts in Aceh and sent more than 200 of its members to the provincial capital of Banda Aceh. It has been collecting corpses, distributing food and spreading Islamic teachings among refugees in the city, its members said.

The group, accused of involvement in Christian-Muslim fighting elsewhere in Indonesia, said it is unarmed and has only come to the province to help with the humanitarian assistance.