At least six people have been killed and several others injured after a gunman opened fire in central Krakow, the second largest city in Poland. Details are still emerging - here is everything we know so far.
How did the attack play out?
The attack began shortly before 15:00 local time (14:00 GMT) in Krakow's Main Market Square, the bustling central point of the city.
Police said a man drove into the square before beginning to fire "at random people from his car".
Footage from the scene shows scenes of panic as people fled, with the sound of gunfire clearly heard.
Follow live updates from Krakow
Armed officers raced to the scene and engaged in a gunfight with the attacker.
The gunman was shot but is alive and has been arrested.
Distressing footage authenticated by BBC Verify shows the moment a police officer confronts the suspect on the ground before firing his weapon several times.
The officer then falls to the ground, apparently having been injured himself.
City officials have urged people who live in the city and tourists to stay away from the area while an investigation continues.
Moment shooting heard in Krakow square
How many people have died and been injured?
Six people - four women and two men - are confirmed to have died.
Around a dozen people have been injured, including two police officers who were shot while detaining the attacker.
One of the police officers was described as being in a "very critical condition" by a Polish government minister after being shot three times while arresting the attacker. The officer is undergoing surgery, he added.
Polish authorities have not confirmed the names and ages of the other victims.
What do we know about the suspect and motive?
Police have confirmed the attacker was a male Polish citizen but no further details about his identity have been released.
The suspect was wearing "military-style attire" and had a military-grade weapon, according to a police spokesperson
Nothing has been publicly confirmed about the motive behind the attack so far.
What has the reaction been in Poland?
Polish Prime Minister Donald Tusk is on his way to Krakow and is expected to give an address later on Saturday.
Earlier, he said he was being kept informed by the interior minister and that police were investigating "the background and all the circumstances".
President Karol Nawrocki said he was "deeply concerned" and was awaiting "a full explanation of the circumstances surrounding these tragic events".
US ambassador to Poland Tom Rose described it as a "savage and murderous attack".
