A knife-weilding security guard who ran amok, killing a bank officer and injuring the victim's colleague at a bank in Taman Molek on Friday, was recruited according to regulations, said the former's employer.

Safeguards G4S managing director Sharin Baba said the employee's records showed he had a licence to serve as security guard, in accordance with the laws of the country.

"He underwent a selection process, recruitment and training relating to the services rendered in accordance with the law," he said in a statement here Sunday.

READ: Guard runs amok, kills bank officer, injures another

"The employee is a Malaysian citizen who has served with the company for over a year.

"The company has never received any complaint on his behaviour or his service," he said in a press statement here today.

Sharin said his company sympathised with the victims and would cooperate with the police to facilitate investigations.

READ: Security companies must ensure guards undergo mental, emotional health screenings

In the 3.30pm incident, HSBC bank officer Ho Chin Tau, 33, was stabbed to death while his 54-year-old female colleague was injured by a security guard who ran amok while armed with a knife.

The suspect was arrested by the police with public assistance and remanded for a week to facilitate investigations.

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