Security officials and witnesses reported bodies strewn on the ground as plumes of smoke rose high into the air after the bomb detonated on Mogadishu's Maka Al-Mukarama road, one of the seaside capital's main thoroughfares, an area busy with businesses and travellers.
China will launch a month-long, nationwide inspection campaign into hazardous chemicals, mines, transportation and fire safety
The blast occurred on Thursday at the Chenjiagang Industrial Park in the city of Yancheng, in Jiangsu province, and the fire was finally brought under control at 3.00am on Friday (1900 GMT), state television said.
The blasts came during a Farmers Day celebration in the southern city that was attended by nearly 1,000 people.
The Chinese chemical industry park where an explosion last month killed 78 people and left hundreds injured will be closed, authorities have said.
Two children and eight security forces were among the casualties, said Ataullah Khogyani, spokesman for the Nangarhar provincial government.
Three people died and more than 30 injured in a twin suicide blast in the northeastern Nigerian city of Maiduguri, militia sources and residents said on Sunday.
Police have detained 17 more suspects connected to a chemical blast in eastern China last month which killed 78 and left hundreds injured, local authorities said on Monday.
The exact locations of the strikes were not known, but the roar of airplanes over the city was accompanied by heavy explosions between 11.00pm and midnight.