PETALING JAYA, Feb. 19 -- Four policemen, including a senior officer, were arrested yesterday after they allegedly extorted RM3 million as an inducement to cover up a drug processing laboratory in Cheras, Kuala Lumpur that has since been raided.

The four were identified as an inspector, two detective corporals and a corporal who are attached to the Selangor Criminal Investigation Department's (CID) serious crimes division.

An informed source, familiar with the case, said the suspects were detained at the CID office at the Selangor police contingent headquarters in Shah Alam at 9.45am yesterday.

"The arrest was made by a special CID team from the Kuala Lumpur police's serious crimes division that acted on an extortion report made at the...