Confession video found on suspect's phone after Berlin Pride attack

A confession video has been found on the deceased suspect's phone after the deadly Berlin Pride attack, a spokeswoman for Germany's Federal Public Prosecutor's Office said on Tuesday.

The spokeswoman confirmed a report in the Bild tabloid that investigators have discovered a video claiming responsibility for the attack on Saturday evening. 

The video contained a pledge of allegiance to the Islamic State terrorist organization, the spokeswoman said. 

The Spiegel news magazine said the man in the video is believed to be the 21-year-old suspect, Abdul B, who allegedly drove into a crowd in the Tiergarten park before attacking passers-by with a bladed weapon, said to be a machete. 

A Polish woman was killed, while 31 people were injured, according to updated figures presented by Berlin Mayor Kai Wegner on Tuesday. The previous official figure was 29 injured, including several seriously hurt. Wegner did not initially give further details.

Prosecutors in Warsaw said on Tuesday that they have opened an investigation into the death of the Polish woman, whose daughter was with her during the attack. 

Poland's Foreign Ministry said on Monday that the adult daughter is being treated in hospital, but her life is not in danger. She has been informed of her mother's death, the ministry added.

Berlin's Pride celebrations, known in Germany as Christopher Street Day (CSD), were called off on Saturday evening after the attack. 

The suspect was killed by police at an allotment in the western district of Spandau on Sunday following a day-long manhunt. 

Calls for tighter controls on Islamist suspects

Mayor Wegner has called for tougher action to be taken against Islamist suspects in the wake of the terrorist attack on Berlin's Pride event, saying police and domestic intelligence services need additional powers to keep closer tabs on such individuals. 

The conservative politician made the remarks after a meeting of the city state's government.

"We must ensure that these suspects are under control at all times," Wegner said. "It simply will not be possible to monitor these suspects 24/7 - at least not through police officers." New forms of monitoring were therefore needed with the aim of preventing attacks like the one in Berlin, he said. 

The use of ankle tags should be discussed, he added, along with other technical options, with laws amended where necessary. 

German Interior Minister Alexander Dobrindt alse spoke out the previous day in favour of greater use of electronic ankle tags for suspects.

Abdul B had been classified as a "potential threat," a person whom investigators consider capable of committing serious crimes, up to and including terrorist attacks.