Iraq arrested four people in connection with an earlier rocket attack launched against a military base in neighboring Syria, officials said late Tuesday.
"Our security forces, supported by intelligence efforts, moved swiftly and succeeded in arresting four of the perpetrators," a short statement from the prime minister's office said.
It added that the suspects had been handed over to the "appropriate authorities" as part of the investigation.
Monday's attack targeted a northeastern Syrian military base in Hasakeh province that had until recently hosted US forces with an international anti-ISIS coalition.
These are the first arrests announced in Iraq related to the Middle East conflict that broke out on February 28.
However, drone strikes and rocket attacks have regularly targeted the US embassy in Baghdad, a US diplomatic center at the Iraqi capital's airport, and forces with the international anti-ISIS coalition.
Syria's army condemned the attack on Monday, and confirmed they were in contact with Iraqi authorities to "locate the perpetrators".
