Here are the latest updates:
- Naved B: 23-year-old Pakistani refugee suspect released
- Isis claims attacker is 'soldier of the Islamic State'
- Polish lorry driver, Lukasz Urban, was stabbed and shot by suspect
- Germans warned to expect 'further significant attacks'
- Farage criticised over response to Berlin tragedy
- Video shows horrifying scenes following terror attack
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Police in Germany say they have detained a migrant in relation to the suspected Berlin Christmas market "terror attack" in which at least 12 people died and 48 were injured.
Officers are treating the incident, in which a truck ploughed into a crowd at the Breitscheidplatz market outside the Kaiser Wilhelm memorial church, as an act deliberately intended to cause harm.
The alleged man behind the tragedy has since been identified as Naved B, according to Welt.de, a 23-year-old Pakistani refugee who was allegedly living in the capital's largest migrant camp at a converted airport hangar.
The suspect however has denied responsibility, according to security officials, while German Chancellor Angela Merkel said "we must assume it was terrorism".
"Our investigators assume that the truck was deliberately steered into the crowd at the Christmas market at Breitscheidplatz," police said on Twitter.
"All police measures related to the suspected terrorist attack... are progressing at full steam and with the necessary diligence."
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