SEOUL - The death toll from a blaze at an indoor shooting range in a South Korean city has risen to 11 after a local victim died while being treated for severe burns, hospital officials said Wednesday.

Seven of those killed in Saturday's blaze in the southern city of Busan were Japanese tourists, who visited the shooting range as part of a group tour.

The latest victim, 67-year-old Moon Min-Ja, had suffered severe burns and died of heart failure, a hospital official was quoted by Yonhap news agency as saying.

Police are still trying to determine the cause of the fire. President Lee Myung-Bak Monday ordered a thorough investigation and urged South Koreans to be more careful about safety.

Local media blamed carelessness for the tragedy.

The fire "exposed our society's inveterate numbness and insensitivity to safety risks despite an embarrassing track record of accidents," the JoongAng Daily said in an editorial Wednesday.

The paper said the fire "was caused by oversights in basic and fundamental safety precautions typically witnessed only in underdeveloped societies."