A bomb exploded underneath a car in front of a Tunis port police station causing no injuries but representing a dangerous escalation in the country's political crisis, The Associated Press reported.

The blast, in the Tunis port area of La Goulette, came on the day assassinated leftist politician Mohammed Brahmi was set to be buried.

"As we were leaving the station for a routine patrol, we saw a suspicious package under the car," said police officer Mourad Mliki told the AP. "We went back to the station to tell our superiors and there was a huge explosion — it was set off remotely."

The blast shattered windows in the neighborhood and damaged nearby cars. In the aftermath police flooded the neighborhood, setting up checkpoints.