PODGORICA, Montenegro — At least 13 people were killed and 32 were injured when a bus carrying Romanian tourists swayed off a bridge and plunged into a deep ravine in central Montenegro on Sunday, police said.

Montenegro Interior Minister Rasko Konjevic said the bus with 46 people on board crashed some 30 kilometers (18 miles) north of the capital, Podgorica. He said the bus was traveling from Romania to Montenegro's Adriatic coast.

Police said the bus plunged from a bridge over the Moraca river during a rain storm and crashed some 40 meters (130 feet) into the ravine. A helicopter was used in the rescue operation mounted by Montenegro police.

Konjevic said "sadly, this death toll could climb further" because seven of the passengers were seriously injured.

The winding road that leads from Serbia in the north through the Moraca canyon and then to the seacoast is notorious for traffic accidents because it is narrow and slippery in wet weather conditions.

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  • Rescuers and others gather at the site of a bus accident in Ratnagiri district, in the western Indian state of Maharashtra, Tuesday, March 19, 2013. The bus packed with passengers crashed through a guard rail and fell off a bridge in western India early Tuesday, killing at least 37 people and injuring another 15, police said. (AP Photo)

  • Bodies of victims of a bus accident are laid in a row near the site of the accident in Ratnagiri district, in the western Indian state of Maharashtra, Tuesday, March 19, 2013. A bus packed with passengers crashed through a guard rail and fell off a bridge in western India early Tuesday, killing at least 37 people and injuring another 15, police said. (AP Photo)

  • Rescuers and others gather at the site of a bus accident in Ratnagiri district, in the western Indian state of Maharashtra, Tuesday, March 19, 2013. The bus packed with passengers crashed through a guard rail and fell off the bridge in western India early Tuesday, killing at least 37 people and injuring another 15, police said. (AP Photo)