Armed guards surrounded the helicopter as soon as it touched town on the prison grounds, media reported, as the facility remains on alert after an attempt to free a top Islamist extremist as he was being transported there in March.
The five wedding guests were released after the private aviation company promised officers it would not happen again, said Brigadier General Syed Iftekhar Uddin.
“It landed in the prison by mistake. Meghna Aviation has said sorry. They said it happened due to poor visibility,” Uddin told AFP.
But he added police were “concerned” following reports that Islamist extremists could be plotting to free fellow militants.
Bangladesh has detained scores of extremists in recent months as part of a massive nationwide crackdown that followed a wave of deadly attacks.
In April, top Islamist extremist leader Mufti Abdul Hannan was hanged at the same prison after he was convicted of a grenade attack on the British ambassador in 2004 and a array of blasts that left scores killed in the 2000s.
Before the execution, militants made a daring attempt to free Hannan as he was being taken to the jail in a prison van.
(AFP) PLACE YOUR TEXT ADVERT BELOW:>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> How I Made Me =N=2.5 MILLION In 7 Days from 2 Common Product I Imported and how you can do the same. Click HERE FOR FREE Details right now Warning To Men: This 3 Foods Is Killing Your Erection. Click Here To Know Them Mr Kilanko Woke Up At About 12Midnight To Urinate. He Almost Fainted When He Just Couldn't Pee: ENLARGED PROSTATE!!! ANY MAN ABOVE 40 Shouldn't Wait For This Crisis! PREVENT Or SHRINK Your Enlarged PROSTATE Now! Click Here!