MANAMA - The Bahrain Defence Force signed a $3.8 billion deal with Lockheed Martin to buy 16 upgraded F-16 aircraft on Tuesday, the official Bahrain state news agency said.

In September, the U.S. State Department approved arms sales packages worth more than $3.8 billion to Bahrain including F-16 jets, upgrades, missiles and patrol boats.

U.S. President Donald Trump said Washington's relations with Bahrain would improve, after meeting with the king of the Gulf Arab state during a visit to Saudi Arabia in May.

(Reporting By Stephen Kalin; Writing By Maha El Dahan, editing by Pritha Sarkar) ((Maha.Dahan@thomsonreuters.com; + 9712 4082101; Reuters Messaging: maha.dahan.thomsonreuters.com@reuters.net))