Police in Germany have temporarily cleared the Frankfurt Occupy tent camp next to the European Central Bank.

Some 340 people left, some of them carried by police as they offered passive resistance, the DAPD news agency reports. There were 13 arrests.

The clearance was completed when the last two protesters came down from trees they had climbed.

The tent camp was cleared as part of security measures ahead of protests this weekend by a group calling itself Blockupy, which has called for barring access to the bank.

City officials say the Occupy tents can be re-occupied on Sunday.