Two explosions, about an hour apart, struck different areas of the Afghan capital late on Thursday, an official said. There were no casualties but some damage to a power station was reported.
The first explosion hit the power station in the north of Kabul while the second, from a roadside bomb, occurred in the east of the city, said Interior Ministry spokesman Tariq Arian.
A man carrying an AK-47 automatic rifle was arrested in the area of the power station, but it wasn't immediately clear if he was involved in the attack, said Arian. The rocket hit the station's outer wall.
No one immediately claimed responsibility for the attacks. Both the Taliban and the Islamic State group are active in Kabul and its surroundings and frequently strike military and civilian targets.