Deep sea explorers have found two Japanese aircraft carriers that were sunk in battle in World War Two.

The carriers were among seven ships that went down in the Battle of Midway, a major air and sea battle fought between the US and Japan in 1942.

One ship, the Kaga, was discovered last week, while wreckage from another carrier, Akagi, was found on Sunday.

Until now only one other ship sunk in this battle had ever been found – the American vessel USS Yorktown, in 1998.

This month’s discoveries came after weeks of searching by crew members based on the research vessel Petrel. The vessel is owned by Vulcan Inc, a company created by the late Microsoft co-founder Paul Allen.