Attacks overshadow start to Malaysia soccer season
One of the victims, winger Faisal Halim, was left in a critical condition after an acid attack in a shopping mall last weekend.
Police have yet to establish a motive, or whether the incidents are linked.
Malaysia’s football association has urged high-profile players to take precautions, including hiring bodyguards.
Faisal Halim suffered serious burns after being splashed with acid while shopping near the capital, Kuala Lumpur, on 5 May.
The 25-year-old star winger has since undergone skin graft surgery. Football officials say he is responding but remains in intensive care.
Police are analysing the fingerprints of a suspect arrested at the mall, local media report.