At least 21 people were killed when an overcrowded passenger bus plunged into a river in the Indian part of Kashmir, police said. Seven others were injured in the accident. Senior police official Haseeb Mughal said the accident happened early Monday morning near Bhanderkot, a mountainous region about 150 miles (240 kilometers) northeast from Jammu, one of the main cities in India's Jammu-Kashmir state. Mughal said rescue operations were continuing at the accident site. The bus plunged about 800 feet (244 meters) into the fast-moving Chenab river. Deadly road accidents are common in India - often caused by aging vehicles, overloading and reckless driving on poorly maintained roads.