A magnitude 5.9 earthquake on Thursday struck Irans southern province of Bushehr, which is home to a nuclear power plant, state television reported. There was no immediate report of damage or injuries. Many houses in rural parts of the province are made of mud bricks, which have been known to crumble easily in quake-prone Iran. "The quake hit the Kaki area in the province this morning," the television said. State TV did not report any damage at Bushehr plant, which has seen other earthquakes in the past. According to the semi-official Tasnim news agency, the depth of the quake was 18 km. It gave no further details. Iran sits atop several fault lines and has been hit by a series of earthquakes since November 2017, when a 7.3-magnitude tremor killed 620 people in the western province of Kermanshah and eight in Iraq.