After Malaysia Airlines flight MH370 disappeared in March 2014, the tragic incident still remains a mystery. The search for the ill-fated plane continues until today but according to Australian officials, they’re “confident” to locate the missing plane.

As reported on BBC, Deputy PM Warren Truss mentioned that officials are “optimistic” in the Perth Search. Likewise, Assistant Minister for Defence Darren Chester told the press: “We have a high level of confidence that we are searching in the right area.”

In the Australian-led search, officials use underwater drones and sonar equipment to search for MH370 across 120,000 sq km area of seabed. The location is said to be 2,000 km off the coast of Perth, Australia.

About 239 people were on board MH370 when it disappeared en route from Kuala Lumpur to Beijing. After a year of search operations, a flaperon (part of an aircraft wing) was found on Reunion Island in July. Although France confirmed it was from the plane, officials believed it could have been carried by ocean currents.

In October, there were speculations that the plane wreckage has been found in the Philippines. A Malaysian claimed to have found a plane full of skeletons in a remote island in the country. However, Philippine authorities dismissed the reports.

A new report from the Australian Defence Science and Technology Group revealed that MH370 has gone down in the Southern end of the Indian Ocean. The Joint Agency Coordination Centre (JACC), who’s in charge of the search, affirmed the group’s report. However, JACC said that they have focused “on a shortened but slightly widened section of ocean.”

At a press conference, Truss said that he is “hopeful” and “optimistic” to find the missing plane. He mentioned that the group’s report gave officials “real encouragement.” The Deputy PM said that operations will likely end on June 2016.

According to BBC, the entire cost of the operation is expected to be about A$180 million.