An explosion outside a courthouse in the Turkish Aegean city of Izmir has killed at least two people, including a police officer, and wounded several others, according to a statement by the governor of the city.Two attackers were killed in a gunfight with the security forces following the blast caused by a car bomb, the state-run Anadolu Agency said on Thursday, adding that the police was searching for the third attacker.The governor of Izmir, Erol Ayyıldız, told reporters that a police officer and a courthouse employee were killed in the incident.At least six wounded people were taken to hospital in the city located on the country`s western coast, he said.The assailants carried out the attack after they were stopped at a checkpoint outside the courthouse, the governor added.Burning vehiclesVehicles were burning and ambulances were rushed to the blast site, according to the photographs shown on national television networks.Damage was reported around the area close to one of the gates of the courthouse, where the blast happened, Turkish media said.Al Jazeera`s Mohammed Jamjoom, reporting from Istanbul, said the latest attack shows how volatile the security situation in Turkey is."It is interesting that this happened today because just yesterday there was news from officials that at least 20 people were detained in relation to the attack on the Reina nightclub on the New Year`s Eve," he said."There is a massive manhunt going on over the incident."A gunman stormed the Istanbul nightclub killing 39 people during New Year celebrations on Sunday. Source: Aljazeera