A commercial aircraft belonging to Bangladesh’s state-run Biman Airlines was the scene of a foiled hijacking attempt on Sunday. One passenger, who has yet to be identified, reportedly attempted to gain control of the aircraft during a flight from Dhaka to Dubai. The suspect brandished a pistol but was not able to gain access to the cockpit. Meanwhile, pilots made the decision to execute an emergency landing at the Shah Amanat International Airport in Chattogram.

Once the plane was on the ground, elite law enforcement officers alongside members of Bangledesh’s Army and Navy established a perimeter around the aircraft, which housed 148 passengers and an as-yet-undisclosed number of crew members. Unconfirmed reports indicate that the man, said to be around 25 years old, made unusual demands that led some to believe he may have been suffering from mental problems. He reportedly demanded to speak to Bangladeshi Prime Minister Sheikh Hasina, but no other demands have been released to the public.

“From the talks and dialogue we have with him, it seems he is psychologically deranged,” Air Vice Chairman Nayeem Hasan, the country’s civil aviation chief, told the press. “I am saying this because of his behavior,” he clarified.