Customs director-general Abdul Latif Abdul Kadir said it was believed to be connected to the officer’s involvement in conducting operations at the Rajang and Bintulu ports from Oct 21 to Nov 13.

He said the envelope had the word “death” on it and inside was a note saying, “Got two bullet one short one long which one you want.”

He said CCTV recordings showed a man getting out of a car in front of the officer’s house before throwing something into the parking lot at about 7.15pm on Wednesday.

The officer lodged a police report over the incident.

Latiff said a similar note was previously found at a neighbour’s house and he did not rule out the possibility it might also have been meant for the officer.

“The Customs Department takes seriously any form of intimidation or threat against its officers,” he said.

The operations at the two ports led to the seizure of goods worth about RM2.64 million and recovery of tax and duties estimated at RM655,300.