Trump admin live updates: Trump says Hamas will release hostage Edan Alexander

Donald Trump posted about a trade deal with the United Kingdom on Truth Social Thursday morning, saying "the agreement with the United Kingdom is a full and comprehensive one that will cement the relationship between the United States and the United Kingdom for many years to come."

"Because of our long time history and allegiance together, it is a great honor to have the United Kingdom as our FIRST announcement," Trump said. "Many other deals, which are in serious stages of negotiation, to follow!"

No details were given on the trade deal, which is expected to be announced in a news conference at 10 a.m. in the Oval Office.

President Donald Trump is expected to announce a trade deal with the United Kingdom on Thursday morning, according to sources familiar with the matter.

The details of the agreement were not immediately clear. This will mark the first agreement after Trump imposed steep tariffs on dozens of trading partners.

It comes as Trump said on social media he would announce a "MAJOR TRADE DEAL WITH REPRESENTATIVES OF A BIG, AND HIGHLY RESPECTED, COUNTRY."

The White House didn't immediately respond to ABC's request for comment.

-ABC News' Rachel Scott and Katherine Faulders

President Donald Trump in a post on Truth Social said he would be hosting a "big news conference" on Thursday to announce a "MAJOR TRADE DEAL WITH REPRESENTATIVES OF A BIG, AND HIGHLY RESPECTED, COUNTRY."

The news conference is set for 10 a.m. from the Oval Office.

Trump said the announcement would be "THE FIRST OF MANY."

In an interview with Time magazine last month, Trump claimed to have already "made 200 deals" with other countries on tariffs but did not elaborate on which countries or what the terms were.

-ABC News' Kelsey Walsh

Director of National Intelligence Tulsi Gabbard on Wednesday announced the release of about 60,000 files on the 1968 assassination of Sen. Robert F. Kennedy. That's in addition to some 10,000 files released last month.

These “additional investigative materials corroborate this previously released information,” Gabbard said.

“As was first uncovered in the initial tranche of 10,000 RFK files, there were rumors circulating on foreign soil that Senator Kennedy had been shot one month prior to his true assassination date,” she explained.

According to Gabbard, the newly released files “have been sitting in various storage facilities across the federal government for decades and had never been digitized or accessible to the public before.”

The latest release includes the Los Angeles Police Department’s interviews with Sirhan Sirhan, the man who assassinated Kennedy, as well as recordings of interviews with eyewitnesses.

Gabbard said additional files will continue to be “uploaded alongside the previously released files at archives.gov/rfk to ensure all RFK assassination documents can be found in a centralized, searchable format.”

Some files will have redactions for Social Security numbers, tax identification numbers and grand jury information.

-ABC News' Beatrice Peterson