Explosives experts search for unexploded shells in Tripoli, Libya, on April 28, 2020. (Photo by Amru Salahuddien/Xinhua)

Explosives experts are seen during the search for unexploded shells in Tripoli, Libya, on April 28, 2020. (Photo by Amru Salahuddien/Xinhua)

An explosives expert examines an unexploded mortar shell that fell in Tripoli, Libya, on April 28, 2020. (Photo by Amru Salahuddien/Xinhua)