DHAKA, July 7 -- At least five people, including several policemen, were injured in bomb explosions on Thursday morning at the entrance of Sholakia Eid prayer ground in Kishoreganj district, some 117 km northeast of Dhaka.

The largest congregation of Eid prayer in Bangladesh was being held there on the occasion of Eid ul-Fitr that marks the end of the Muslims' holy fasting month of Ramadan when the bombings occurred.

Witnesses described hearing several explosions at the scene at around 9:30 p.m. local time.

It was not known immediately who launched the bomb attack.

A police official told Xinhua from Kishoreganj that security has been beefed up after the bomb explosions in which three policemen and two people were injured.

"We're closely monitoring the situation," said the official who did not like to be named.

The explosions came about a week after a terror attack on a restaurant in Dhaka's diplomatic enclave Gulsan in which 20 people including 18 foreigners were killed.