The private jet Juice WRLD flew on to Chicago was loaded down with 70 pounds of marijuana ... and cops say people on the plane told them the rapper had popped several pills prior to suffering seizures.

Law enforcement sources tell TMZ ... the FBI confiscated the huge stash of weed from several suitcases that were on board the flight. We obtained this photo of the marijuana and luggage in the private jet terminal at Midway.

According to law enforcement, several members of Juice's team aboard the flight -- which landed around 1 AM Sunday -- told them Juice had taken "several unknown pills" prior to the seizures which led to him getting rushed to a hospital.

Further, we're told one of Juice's associates told authorities the 21-year-old rapper has a Percocet problem. Our law enforcement sources also say a bottle of codeine cough syrup was found on the plane.


Juice's cause of death hasn't been determined ... the Cook County Medical Examiner will conduct an autopsy on Monday.

Two men -- Chris Long and Henry Dean -- were arrested for possession of handguns. We're told cops recovered 3 guns in total. Dean was released without bail, and Long is out after posting a $1,500 bond.

Chicago rapper Juice Wrld suffered convulsions and went into cardiac arrest as police and federal agents were searching his and his entourage’s luggage for guns and drugs at a private hangar at Midway Airport over the weekend, according to police.

The officers and agents had been waiting at the Atlantic Aviation hangar at Midway early Sunday because they suspected the private plane from Los Angeles carrying the 21-year-old musician was carrying contraband, police said.

As they were going through two carts of luggage, the rapper — whose real name is Jarad Higgins — “began convulsing (and) going into a seizure,” police sources said. An agent administered two doses of Narcan, an emergency treatment when opioid overdose is suspected.

Higgins woke up but was incoherent, police said. Paramedics took him to Advocate Christ Medical Center in Oak Lawn, where he was pronounced dead at 3:14 a.m., about an hour after he landed in Chicago. An autopsy is scheduled for Monday.

The search turned up 41 “vacuum-sealed” bags of marijuana, six bottles of prescription codeine cough syrup, two 9 mm pistols, a .40-caliber pistol, a high-capacity ammunition magazine and metal-piercing bullets, according to police. The two guards with Higgins were charged with illegally possessing the guns and ammunition.

The search turned up 41 “vacuum-sealed” bags of marijuana, six bottles of prescription codeine cough syrup, two 9 mm pistols, a .40-caliber pistol, a high-capacity ammunition magazine and metal-piercing bullets, according to the sources. Two men identified by police as working security for Higgins were charged with misdemeanor offenses for illegally possessing the guns and ammunition.