Police arrested another person for his suspected link to the killing of four school boys who had gone missing from Sundrateki village in Bahubal upazila of Habiganj on Friday.Detective Branch (DB) of police arrested Arju Miah from the village early Thursday.A total of three people have so far been arrested in connection with the gruesome murder.Earlier, Shuvo, Tajel, Monir, and Ismail went missing while playing in a field at the village on Friday afternoon.On Wednesday morning, some sand workers first saw a leg and a hand peeping from beneath the earth near Ichharbil spring in the village.On information, police rushed in, recovered the bodies, and sent them to sadar hospital morgue for autopsy.Later, the bodies were handed over to family members following the post-mortem.