Police officers were kept busy on both days hours before the start of the official 9 pm to 5 am curfew hours.
Yesterday, two men were killed and one shot and wounded during a shooting incident in Morvant.
The victims have been identified by police as Atiba Riley and Abdool Mohammed.
Also yesterday, a maxi taxi driver identified as Richard Joseph was killed after being robbed while working his green band maxi along Cunupia Main Road near Homeland Gardens.
Hours before on Tuesday night, a 45-year-old Guyanese national was gunned down in a drive-by shooting in Piarco while talking to a friend just a little over an hour before the curfew kicked in.
He was identified as Nigel Mootoo, of Carnbie Road, Piarco.
According to a police report, around 7.45 pm Mootoo was speaking to a friend at Carnbie Road, Piarco, when they saw a hatchback vehicle believed to be a Nissan Tiida drive along the roadway and then turn around.
A man came out of the vehicle and began shooting.
Mootoo was shot about his body and succumbed to his injuries on the scene. His friend, who was shot in the buttocks, was taken to the Eric Williams Medical Sciences Complex, Mt Hope, for medical attention. He was said to be in a stable condition last evening.
Police said they recovered 21 spent 40-calibre casings, one projectile fragment, one apparent projectile and four deformed projectiles at the scene of the attack.
In a separate incident, a 29-year-old man of Greenvale, La Horquetta, Arima, escaped injuries