The state IRNA news agency reports than 100 of those injured had to be hospitalized.
State radio said that people rushed into the streets when the quake struck at 2:56 a.m. local time.
The shaking knocked out power and telephone service across one of Iran’s key ports and home to a large oil refinery that mainly produces fuel for domestic use.
In early September 2008, a 6.1 magnitude quake near the same epicenter killed seven people and wrecked buildings.
Shaking from that quake was felt across the Persian Gulf in Dubai, where people rushed out of tall buildings that began to sway.