Federal Territories Minister Tengku Adnan Tengku Mansor said the Kuala Lumpur City Hall (DBKL) senior officer arrested for alleged corruption was a "good officer", who was promoted twice in a year due to his dedication and being good in decision-making.

"As far as I know, the officer is a good officer, committed to his job and attentive. He moved up from Grade 54 to Special Grade C, and he is currently Special Grade B because he is good and has potential.

"However, that is him at the workplace... what he does apart from his job, I do not know," he told the New Straits Times.

The minister, who is often referred to as Ku Nan, also urged the Malaysian Anti-Corruption Commission (MACC) to conduct a full and fair investigation.

He also noted how colleagues and contractors could at times be jealous of a DBKL officer due to his achievements.

"I urge public servants to not have bad intentions against their colleagues and to stop being jealous of each other’s success.

"They have to work together to develop the country with integrity and honour," he added.

Tengku Adnan also reminded his ministry officers and others to live within their means and not become embroiled in corruption.

"They must work and carry out their responsibilities with integrity," he said.

The DBKL officer was among three senior officers detained on Monday for allegedly committing graft, abuse of power and money laundering.

The others were from the Malacca Public Works Department and Kelantan Tenaga Nasional Bhd. The commission seized various assets, including luxury cars, from the trio.

They also seized RM400,000 and froze RM13 million in accounts belonging to the suspects, including savings accounts and unit trusts worth between RM1 million and RM6 million.

During the raid, MACC officers also seized huge amounts of cash hidden in the ceiling of one of the suspects’ house.