A powerful explosion has damaged a building in the centre of the Czech capital Prague, the Associated Press reports.
Police spokesman Tomas Hulan said it is not immediately clear what caused the blast and it is believed some people are buried in the rubble.
At least 13 people have been injured, fire service spokeswoman Pavlina Adamcova said.
Windows in buildings located hundreds of metres from the blast were shattered, including some in the nearby National Theatre.
More top news
Two women accused of murdering Kim Jong-nam - the half-brother ofKim Jong-un - have revisited the scene of the attack.
It's a cloudy start for many with some rain around, mainly in the north and west
The hearing will focus on the law that forbids abortion in cases fatal foetal abnormality or where the pregnancy arises through a crime.