A rocket landed at the headquarters of several global oil companies, including the US giant ExxonMobil, in Iraq's southern Basra, Wednesday, and injured two Iraqi workers.
It was the latest in a range of attacks on oil infrastructure in the region.
The razette hit the Burjesia residential and operation headquarters west of Basra, the Iraqi police said.
Al Jazeera's Charles Stratford, who reports from Basra, said a local security representative confirmed that Exxon evacuated approx. 20 foreign employees immediately. Other businesses operating on site include Royal Dutch Shell PLC and Italian Eni SpA.
" The oil ministry says the oil production in the area is not affected by this attack," Stratford said, adding the security manager described the rocket used as a katyusha.
"[But] we see what can only be described as an increase in the frequency of such events, during the last one and a half months there has been a figure involving rockets fired at what has been interpreted to be foreign interests here, "he added.
The United States sent 1000 more troops to the Middle East in the midst of Iran tensions
Oil attacks continue
Last Thursday, two explosions took place on oil tankers in Oman Bay. Four oil vessels were targeted in May, also near the Hormuz strait – an important transit route for oil and gas from the Middle East.
It is unclear who was responsible for the explosion. US officials have pointed a finger at Iran, which has denied any charges.
Earlier this week, on Tuesday, a rocket landed near an Iraqi military base that hosted US forces in the northern part of Mosul, an Iraqi military statement.
Hree rockets hit another base hosting American troops north of the capital, Baghdad, Monday. There were no immediate claims for damages.
The series of events occurs when tensions continue to struggle between the United States and Iran, where Iraq is seen as a possible place for any violent flare between the two arch rivals.
The United States also has the Black List Iran's Revolutionary Guard Corps which has ties to a number of armed groups operating in Iraq as a " terrorist group ". Iran has done the same for US forces operating in the Middle East.
The US Secretary of State Mike Pompeo said on Tuesday that President Donald Trump's administration did not want war with the Islamic Republic.
But Pompeo promised Washington to continue pursuing a "maximum pressure" campaign against Tehran, as it accuses of being a destabilizing actor in the Middle East .
Al Jazeera and news agencies