ISLAMABAD - The Indian military helicopter chopper that was forced by Pakistan to land for violating its airspace has returned to India along with the four Indian army officers. After necessary checking and other procedural formalities, they (Indian) were allowed to go back, sources in the ISPR told TheNation. The sources said that the authorities on Sunday forced an Indian military helicopter to land and taken its four-member crew into custody for violating the Pakistani airspace. The helicopter had intruded into Pakistani territory in Olding sector in northern Skardu region around 1pm (0800 GMT). The helicopter had come deep into our airspace. It was forced to land. Four Indian army officers have been taken into custody. They are safe, the sources said, adding that India was later informed of the incident. Our air defence aircraft immediately scrambled into the air and reached the area and forced the helicopter to land, a Pakistan Air Force official said. A military official said that a lieutenant colonel, two majors and a junior commissioned officer of the Indian army were on board the helicopter and all of them were detained. Agencies add: The Indian helicopter was released after senior military officials from both sides spoke on a hotline. The helicopter and four officers on board returned around 5.30 pm (1230 GMT) after a contact between the director-general military operations of the two countries, Pakistani military spokesman Major-General Athar Abbas said, adding that the Pakistan army provided refuelling for the helicopter. The Indian defence ministry said the helicopter had returned to Kargil in Indian-occupied Kashmir. The issue has been resolved, the ministry spokesman, Sitanshu Kar, said. Indian officials said the helicopter strayed into Pakistani territory because of bad weather. An Indian government foreign affairs spokesman said on Twitter the government was 'relieved that the officers and helicopter were back in India. He said that India greatly appreciates the manner in which Pakistan worked with us in resolving the matter. Investigations were under way to determine why the helicopter crossed into airspace around Pakistans northern Skardu area, Abbas said. Earlier, Indian television reports cited army sources saying the airspace violation by the Cheetah model helicopter operated by the 666 Siachen Falcons was not intentional. The reports said the helicopter entered Pakistan territory during whiteout conditions due to snow in the mountainous region. It was due to bad weather that the Cheetah chopper strayed across the LoC. There was no deliberate attempt to intrude, the Indian army said in a statement to Times Now television station. In another development, India on Sunday blamed Pakistan for violating the ceasefire, saying that Pakistani troops resorted to firing on Indian forward posts along the LoC in Jammu and Kashmirs Poonch district.