A 52-year-old farmer was also robbed off K14 million the day he was killed at his Tambala Estate in Masuku, Traditional Authority Bwananyambi in Mangochi.
Mangochi police station spokesman Rodrick Maida said officers have arrested the three suspects on separate occasions with the help of community members.
He said they are following leads and hinted of further arrests of other two suspects.
Police has withheld particulars of the suspects being held “for fear of jeorpadising our investigations.”
Maida said once the other two suspects have been arrested, they will put together details of the murder case.