Suspected Militants tried to storm the heavily-guarded Samangi airbase and airport in Quetta, the capital of Pakistan's Balochistan province, but the attack was thwarted by security forces who killed four attackers.Four suspected militants have been killed in the exchange of fire while at least five loud explosions were heard near the airbase and airport last night, Dawn reported."Security forces had also found and disabled four bombs near the Khalid airbase," Sarfaraz Bugti, Home minister of the Balochistan province told PTI."There were two other incidents after the bombs were found. Armed men opened fire near the Samangi airbase and one kilometre from the Quetta airport," he added.A high level source said that two of the suspected militants were killed at the Khalid airbase and two at the Samangi airbase and firing was still going on at both places.The Khalid airbase is located in the Cantonment area of Quetta in Nawakhali while the Samangi airbase is located on the outskirts of the city.The distance between the Samangi airbase and Quetta airport is two kilometres apart.Bugti said that at both places security forces which included police, Airport security forces and Frontier Corps had repulsed the attacks and heavy exchange of fire took place between the attacker and security forces.Bugti also said that security forces responded after the suspected militants had first fired rockets from a gutter lane near the airbase and airport.He said additional security forces had cordoned off the area while the injured had been rushed to the Bolan Medical complex in Quetta.

In July, 10 terrorists had attacked the Karachi airport building, killing at least 29 people.After the July incident, security was beefed up at all airports and airbases around the country.