At least three people were killed when a suspected car bomb ripped through the main street of the Ugandan capital Kampala on Saturday.
The blast was followed by another explosion soon after near the presidential palace, although the authorities have not yet confirmed whether this was a targeted attack.
The first explosion went off when the suicide bomber walked past the Department of Finance at about 3 p.m. local time.
Hospital staff told local media that the injured included President Yoweri Museveni and that the Presidential Palace was damaged.
The deputy director of the state agency Uganda National Intelligence Services, David Okah, later told local media that the president, who had not been reported to be injured, had returned to the palace.
“It was a nightmare scene. Once again, we lost friends, innocent people, that was too painful,” Ugandan Red Cross officer Phillip Kasande told Reuters television.
“I have been working for many years, but I have never seen anything like this before,” another employee told the local paper the Observer.
Ugandan police deployed heavy security to the area and ordered all residents to move away from the blast area. Many stood in groups watching as emergency personnel treated the injured and also carried away the dead.
Police also shut down major roads as an inquiry was launched.