Four men, including a man identified as a Somali diplomat, have been charged in a Kenyan court with terrorism-related offenses for the detonation of an improvised explosive device at a popular restaurant at the Nairobi international airport.

The four denied involvement Tuesday in the Jan. 16 attack, which blew up a trash can and part of the ceiling of the Java House restaurant near the entrance of an international departure terminal at Jomo Kenyatta International Airport. No one was injured.

Magistrate Doreen Mulekyo set a bail hearing for next week.

No one claimed responsibility for the attack but one suspect reportedly belongs to al-Shabab, an al-Qaida-linked Somali militant group that has vowed to carry out attacks in Kenya for sending its troop to Somalia to fight the militants.