Two men were injured in a blast at Triq Azzopardi in Marsa.
The incident happened at 6.30pm.
Three foreign men were near a cooker when the blast took place, injuring two of them. They were transferred to Mater Dei Hospital for treatment.
One has been identified as a 32-year-old man from Guinea. He was grievously injured. The other man, a 24-year-old from Mali, was slightly injured.