SEOUL - Twenty-eight people were injured on Saturday in South Korea's gas explosion accident, according to Yonhap news agency.

The explosion occurred at about 10:17 am local time (0117 GMT) inside a dry sauna in Yangju, Gyeonggi province.

The injured included both customers and employees, with three individuals reported to be in serious condition.

The explosion, which caused no fire, led tens of customers to evacuate.

The fire authorities dispatched 42 personnel and 17 equipment for rescue operations.

The authorities were investigating the exact cause of the accident.