At least four people have been injured in an explosion in the Afghan capital Kabul, local media including the TOLOnews broadcaster report.
The bombing took place in the north of the city and targeted a convoy belonging to the Afghan Intelligence Agency, the reports said.
The Afghan Interior Ministry has not confirmed the type of explosion or its target.
Pictures shared on social media showed a big white plume of smoke over the city.
Some pictures showed a damaged vehicle belonging to the intelligence agency.
No group has claimed responsibility for the incident.
It was the first relatively powerful blast in the capital in recent weeks.
Insurgent attacks are a frequent occurrence in many parts of the country amid a slow-moving peace process.
Last week, US President Joe Biden announced the withdrawal of US troops from Afghanistan by September 11, several months after the May 1 deadline previously agreed with the Taliban.
In response, the militants announced they would not participate in a high-level Afghan peace conference in Turkey scheduled for Saturday.