An Air Transat Boeing 737-800, registration C-GTQG performing flight TS-942 from Montreal,QC (Canada) to Fort Lauderdale,FL (USA) with 189 people on board, was enroute at FL360 about 40nm north of Newark,NJ (USA) when the crew received a cargo smoke indication and diverted the aircraft to Newark for a safe landing on runway 04R about 16 minutes later. The aircraft was evacuated, two people received minor injuries as result of the evacuation, one of them was taken to a hospital.

The airport reported there was no fire in the cargo hold, however, there was a lot of smoke. Two people received minor injuries unrelated to the smoke, one person of them was taken to a hospital.

The airline reported the crew received a cargo smoke indication and diverted to Newark, where the aircraft was evacuated. No injuries occurred.

The FAA reported the aircraft diverted to Newark's runway 04R due a possible fire in the cargo hold, the aircraft was evacuated. 

Passengers reported there was no unusual odour and no smoke in the cabin.

The occurrence aircraft is still on the ground about 8 hours after landing.

https://flightaware.com/live/flight/TSC942/history/20190309/1220Z/CYUL/KFLL