Pabrade, Lithuania - Three of the four American soldiers missing in Lithuania since last week were found dead on Monday, the US army said, after rescuers recovered an armored vehicle from a swamp.

Lithuanian authorities received a report last Tuesday that the soldiers went missing during a military drill at a training ground in the eastern city Pabrade, near the border with Belarus.

Search and rescue teams worked with heavy equipment and excavators to remove silt from the body of water where the vehicle had been located before eventually towing it out of the swamp early on Monday.

"Three US Army Soldiers assigned to 1st Armored Brigade Combat Team, 3rd Infantry Division were found deceased in Lithuania today, March 31," US Army Europe and Africa's public affairs office said in a statement.

Donald Trump Thousands turn out across the US for second round of protests against Trump agenda

It added that search and recovery operations continue for the remaining fourth soldier.

President Donald Trump confirmed the toll of three dead and one missing and described the accident involving the armored vehicle.

"It was a very heavy truck," he told reporters in the Oval Office, "but I mean really heavy, that lifted the heaviest equipment. And it would seem that the bank of a lake collapsed. You know, the weight is so big."

"And it was at night and it was very cold weather. Ice, a lot of ice. And it possibly slipped and the weight is so enormous," Trump said.

The soldiers' identities were being withheld pending notification of next of kin, according to the Army statement.

"Our hearts are heavy with a sorrow that echoes across the whole Marne Division, both forward and at home," said the division's commanding general Christopher Norrie. "But the search isn't finished until everyone is home."

"Words cannot express our gratitude to those still working around the clock during these extensive search and recovery efforts and your unwavering commitment not to rest until all are found," he added.

Politicians JD Vance has "exchange of opinions" with senior Vatican cardinal after being snubbed by pope

Hundreds of local and foreign troops and other rescue workers including engineers and divers had been involved in a rescue operation to recover the M88 Hercules armored vehicle.

Lithuania, a NATO and EU member, hosts more than 1,000 American troops stationed on a rotational basis.

The last of the four American soldiers who went missing in Lithuania last week was on Tuesday also found dead, the US Army said, without providing additional details.

"The fourth US Army Soldier... was found deceased near Pabrade, Lithuania the afternoon of April 1," US Army Europe and Africa's public affairs office said in a statement.

"The Soldier's identity is being withheld pending confirmation of notification of next of kin," it added.

The army did not specify where exactly the soldier was found.