MEXICO CITY - At least seven people were killed and about 30 injured, some critically, after a bus overturned on Tuesday night on the outskirts of Rosarito Beach in the northwestern Mexican state of Baja California, the municipal fire department confirmed on Wednesday.

The accident took place on Boulevard 2000 in Popotla, which borders Tijuana, according to Rosarito municipal authorities.

"Among the deceased were four women and three men, but the exact number of injured is unclear at the moment, although we estimate about 30 people," Ernesto de la Rosa Martinez, the Rosarito fire department shift manager, told Xinhua via telephone.

Work continues at the site of the bus accident, he said, adding that passengers were apparently returning from the city of Tecate in the same state.

The vehicle was rented as a tourist bus to transport 45 people, the majority Rosarito residents, for recreational purposes, he added.

Rescue units, ambulances and firefighters from Tijuana helped in the rescue of passengers, according to local police.