12 more people died in a new clash Sunday between Malaysia police and Filipinos in Sempora, raising the death toll to 26. Six Malaysian policemen and 6 Filipino gunmen were killed in the incident. Malaysia's national police chief Ismail Omar said police were "ambushed" by gunmen during a security sweep. Ismail also said police were pursuing another group of armed men in Kunak, another town in the area. Fears mounted that violence linked to a deadly standoff in Lahud Datu, Sabah had spread to other areas. Semporna is 300 kilometers (190 miles) from the site of the 3-week standoff. The leader of the intruders in the Friday clash, Jamalul Kiram III, 74, claims to be the heir to the Islamic sultanate of Sulu, which once controlled parts of the southern Philippines and the Malaysian state of Sabah on Borneo.