Dhaka, June 20 -- A businessman has died in the custody of Muradnagar Police Station in Cumilla after being arrested in a drug raid.

His family alleges he was tortured, but police claim he died of a heart attack.

The deceased, Sheikh Jewel, 45, was an internet service provider.

Police say Jewel and four others were detained on Thursday afternoon while using drugs. A total of 70 yaba pills were seized from them.

After being taken to the police station, Jewel reportedly felt unwell and was transferred to the Upazila Health Complex at 8:50pm, where doctors declared him dead.

Jewel's wife, Shilpi Begum, visited him at the station after his arrest.

"He seemed fine at the time. He told me 'I haven't done anything wrong. Please try to get ...