The State Department has issued a travel alert for Bangladesh, saying there’s reliable information that terrorist attacks could occur against foreigners in the traditionally moderate South Asian country.

Bangladesh has been rocked by a series of attacks this year claimed by Islamic extremists, including killings of secular bloggers and of an Italian aid worker and a Japanese agricultural worker.

The department’s alert issued Tuesday says there’s ongoing potential for extremist violence, including against large gatherings of foreigners.

It says strict restrictions have been imposed on movements of U.S. government officials and their families, restricting them from most public places and from attending events at international hotels.

The Islamic State group claimed responsibility for the attacks on the two foreigners, but Bangladesh’s government has blamed domestic Islamic militants.

Photo Credit: Steamer ships in Dhaka, Bangladesh. Ahron de Leeuw / Flickr