China yesterday condemned fighting on its border between Myanmar forces and ethnic rebels that has left 19 dead, mostly civilians, in some of the worst bloodshed on the restive frontier in recent years. Two Chinese nationals were among 19 people killed in northern Myanmar on Saturday when ethnic rebels attacked security force posts and a casino in an area bordering China, the Foreign Ministry said. The Ta’ang National Liberation Army claimed responsibility for the attack. The group, one of several in Myanmar’s frontier areas that have long battled government forces, said in a statement that it was retaliating for a push by Myanmar’s military against another ethnic insurgent group, the Kachin Independence Army.