The explosives-rigged vehicle exploded in the middle of the afternoon in Ciudad Victoria, shattering police station windows, said an official from the state prosecutor`s office in Tamaulipas.
"It was a car bomb and two people were injured," said the official, who declined to be identified.
Four children who had been in the playground were unhurt, he added.
The country`s first car bombing occurred in July in Ciudad Juarez, Mexico`s most violent city, and there have been several others since then.
It was not immediately clear who was responsible for the latest attack.
But Tamaulipas, which borders Texas, has seen a surge in violence in recent years amid a turf war between the Gulf drug gang and its former allies the Zetas.
On Tuesday the military confiscated 5.1 tons of marijuana from an abandoned warehouse during a routine patrol elsewhere in the state.
More than 34,600 people have been killed in drug-related violence in Mexico since 2006, when President Felipe Calderon launched a military crackdown against the country`s powerful drug cartels.
But violence has continued to grow unchecked in parts of Mexico despite the deployment of tens of thousands of troops.
(Uu.H-AK/P003)
Editor: Priyambodo RH
Copyright © ANTARA 2011
