Social media showed at least one large fire burning. And a witness said a large shopping center was on fire. The resident of a city more than 40 kilometers (25 miles) from Odesa reported hearing the blasts.
A few hours earlier, Odesa city council reported three cruise missiles were fired from a Tu-22 bomber. Five buildings were destroyed and two people injured.
The targets were unknown, but some images from Odesa suggested a mixed residential-industrial area had been hit.