A security guard at the Tengku Ampuan Rahimah Hospital in Klang shot dead his two colleagues after an argument over a "sleeping on the job" remark.

Selangor CID acting chief ACP Omar Mammah said the dead were identified as P Mailvanagam, 47, of Kuala Lumpur and S

Gunasilan, 22, of Taman Sentosa in Klang.