A suspected bomb attack in Laos killed two Chinese citizens and injured one more, Beijing's official news agency Xinhua reported on Monday.The world's second-largest economy has been pouring money into the sleepy Southeast Asian nation, a fellow Communist state, over the last several years, and became its largest investor in 2014. Xinhua identified one of the victims as an employee of a Chinese mining company operating in the mountainous centre of the country. The victims were on board a vehicle when the incident happened on Sunday, it cited the Chinese embassy in Vientiane as saying. The blast, which it repeatedly described as an "attack", occurred in Xaysomboun province, it said.