At least 9 Cambodian people were killed and 30 others injured during a wedding reception in northern part of Cambodia on Saturday night after an unidentified man threw a grenade into the party, a provincial military police chief confirmed on Sunday. The incident occurred at 9:30 p.m. local time in Prasat Sambo district of Kampong Thom province, about 170 km north of Phnom Penh, the capital of Cambodia, Gen. Horm Thul, chief of the provincial military police, said. "While people were enjoying and dancing in the wedding reception, an unidentified attacker threw the grenade into the ceremony," he told Xinhua over telephone. "It exploded and killed 9 people and injured 30." The injured persons were sent to hospital after the incident. Police suspected that triangle love was behind the attack. "It was not terrorism act. We preliminarily concluded that triangle love motivated the attack," he said, adding that no one was arrested as an investigation was underway.