At Berlin's Brandenburg Gate, a makeshift memorial is drawing residents who have come to pay tribute to the victims of Saturday's attack near the city's annual Pride event.

The attacker, Abdul Ballout, who killed one woman and injured 29 others as he ploughed a van through a crowd before slashing away at people with a machete, was known to authorities.

As the city copes with the aftermath, many have expressed that law enforcement should have stepped in earlier to prevent the attack.

After a city-wide manhunt, police shot dead Ballout on Sunday evening in an allotment complex in the capital's western Spandau district.

Prosecutors said Ballout, a German citizen with Lebanese roots, had previous convictions for causing bodily harm, extortion and robbery and had attempted to join the IS group in Syria.