A fire broke out on the sixth floor of the Income Tax Building in Marine Lines area in south Mumbai on Thursday night but there was no report of casualties.Ten fire engines have been rushed to the spot, fire brigade sources said.The building, called 'Aayakar Bhavan', houses the office of the Commissioner of the Income Tax.

The fire call was received at 10.20 pm. There were no reports of casualties so far, the sources said.Efforts were on to bring the fire under control.