YINCHUAN - Police in Northwest China's Ningxia Hui autonomous region offered a reward of 100,000 yuan ($16,410) on Friday for the capture of a man suspected of murdering seven people.

Ma Yongdong, 24, is suspected of killing his pregnant wife, his parents in-law, grandparents in-law, and two children aged three and one year and nine months in their home on the night of October 14, according to the warrant issued by local police.

Local police circulated the warrant on Tuesday after receiving the report. The suspect is believed to have argued with the victims that afternoon, according to the reporter.

Police have released a description of the suspect. Further investigation is under way.