Czech police will tighten security measures after at least twelve persons were killed in Berlin when a truck ploughed into the crowd, Czech Interior Minister Milan Chovanec said.

The decision to tighten security was made after a discussion with Czech Police President Tomas Tuhy, Chovanec wrote on his Twitter account.

The number of police patrols on streets will rise by Tuesday and authorities will meet, probably on Tuesday morning, to decide whether to raise the level of terrorist threat in the Czech Republic.

According to the official, based on the information gathered so far, an upgrade of terrorist threat level in the country is unnecessary.