Medecins Sans Frontieres (MSF) said it was an 'outstanding contradiction' for migrants to be released from the unsafe centre, only for more to be brought in just days later.
Aircraft affiliated with the Tripoli-based government strike forces belonging to the Libyan National Army (LNA) south of the capital
Forces loyal to Khalifa Haftar opened an offensive on Tripoli, Libya in early April. The WHO said that 1,048 people have been killed since the offensive began.
Hundreds of migrants have been sleeping outside the Tajoura detention centre for fear of another attack.
The military clashes in and around Tripoli have exacerbated the humanitarian conditions in which displaced people are living.
Churches in Libya dating back to the fifth century are being restored following the damage that was done to them by ISIS and other militant groups.
According to the estimates of the World Heath Organisation, 1,048 people have been killed in Tripoli since the fighting between the GNA and LNA forces started three months ago. Another 5,558 people have been injured.
Living conditions at the Tajoura detention centre are deteriorating rapidly after it was bombed last week. Some refugees would rather stay in the open and not return to their shelter.