His grandson Wong Soon Hing, 32, said Yong had gone to have lunch with his uncle in Mantin near here at around 11.30am on Monday.
“At around noon, he told my uncle he wanted to take his one-tonne lorry for a vehicle inspection at the Puspakom branch in Senawang.
“However, when a relative went to his house in Mantin the next day, neighbours told him that my grandfather had not come back on Monday.
“We checked with Puspakom and their officials said that my grandfather had been there. Their records also showed that he had failed the inspection.
“We are worried that some unscrupulous groups might have taken advantage of him at that time. His lorry, with the licence plate number NX 5273, is also missing,” he said yesterday.
Wong, who is a salesman, said Yong's family lodged a police report with the Mantin station on Tuesday night.
“We are worried for him because he did not have a handphone with him. He never goes off without contacting any one of us,” he said, adding that Yong has been living alone at his house in Mantin for six months after his wife injured her hand in a recent accident.
“My grandmother is currently living with one of our relatives in Puchong for medical reasons. Although he is alone at home, my grandfather lives only 15 minutes away from our uncle,” he said.
Wong said he and his brother Soon Siong, 29, had even shared the news of their missing grandfather via Facebook friends.
“However, we have had no luck so far,” he said.
Anyone with information on Yong can contact Soon Siong at 018-398 0206.