Heavy fighting erupted on Tuesday evening in the capital of Sudan's embattled Blue Nile state, a witness said, a day after the newly installed military governor declared that the security situation had returned to normal. "One hour ago, I heard gunfire and artillery bombardments in different parts of the city. The shooting lasted about 15 or 20 minutes," a Sudanese journalist in Damazin told AFP, adding that the city's power supply had been cut.