Witnesses said the explosion was caused by a car bomb on one of the capital's busiest streets that was packed with people heading home from work.
A suicide attacker blew up a bomb-laden vehicle in Kabul on Saturday, killing at least two civilians and wounding several others, an Afghan official said.
It was the second attack of its kind targeting security forces in the city, where UAE forces from the Saudi-led coalition that has been operating in Yemen since 2015 hold sway.
A suicide car bomb targeting a foreign forces convoy rocked eastern Kabul early Friday, killing at least one civilian and injuring four in an area where many expatriates reside, the Afghan interior ministry said.
A bomb hidden in an ambulance killed at least 95 people and wounded about 158 in the Afghan capital, Kabul, on Saturday when it blew up at a police checkpoint.
An attack on a hotel in the Somali capital ended on Sunday after 25 people had been killed in a near 12-hour siege, police said, underlining the insurgents' ability to carry out deadly attacks in the heart of the city.
Protesters held placards calling on authorities to uphold the rule of law after Caruana Galizia, 53, was killed by a car bomb just metres from her home in the village of Bidnija on October 16.
Daphne Caruana Galizia, Malta's best-known investigative journalist, was killed on Monday when a powerful bomb blew up her car, police said.
Two car bombs in separate parts of Somalia's capital Mogadishu killed at least 22 people on Saturday and injured several others, police said.