Russia to deploy more anti-aircraft missiles in Crimea

The damage on one of three Ukrainian ships is seen docked after been seized ate Sunday, Nov. 25, 2018, in Kerch, Crimea, Monday, Nov. 26, 2018. The Uk

The damage on one of three Ukrainian ships is seen docked after been seized ate Sunday, Nov. 25, 2018, in Kerch, Crimea, Monday, Nov. 26, 2018. The Uk

Ukrainian national guard soldiers and a police officer stop a car to check documents at the checkpoint near the city of Mariupol, south coast of Azov

Ukrainian national guard soldiers and a police officer stop a car to check documents at the checkpoint near the city of Mariupol, south coast of Azov

One of the captured Ukrainian sailors speaks in a court room in Simferopol, Crimea, Tuesday, Nov. 27, 2018. A Crimean court has ordered one of the Ukr

One of the captured Ukrainian sailors speaks in a court room in Simferopol, Crimea, Tuesday, Nov. 27, 2018. A Crimean court has ordered one of the Ukr

Ukrainian national guard soldiers and a police officer stop a car to check documents at the checkpoint near the city of Mariupol, south coast of Azov

Ukrainian national guard soldiers and a police officer stop a car to check documents at the checkpoint near the city of Mariupol, south coast of Azov

A concrete block is placed to limit traffic at the checkpoint near the city of Mariupol, south coast of Azov sea, eastern Ukraine, Tuesday, Nov. 27, 2

A concrete block is placed to limit traffic at the checkpoint near the city of Mariupol, south coast of Azov sea, eastern Ukraine, Tuesday, Nov. 27, 2

A Ukrainian sailor, center, is escorted by Russian intelligence agency FSB officer, left of him, to a court room in Simferopol, Crimea, Tuesday, Nov.

A Ukrainian sailor, center, is escorted by Russian intelligence agency FSB officer, left of him, to a court room in Simferopol, Crimea, Tuesday, Nov.

MOSCOW (AP) — A military official says Russia will boost the defense of the occupied Crimean peninsula with more anti-aircraft missiles.

The Interfax news agency on Wednesday quoted Col. Vadim Astafyev, the top Defense Ministry official in Russia's south, as saying that Russia will add one S-400 anti-aircraft missile system to the three already deployed in the peninsula.

The announcement comes three days after Russian border guards fired on three Ukrainian vessels and seized them and their crews. The first overt military confrontation between the two neighboring countries has raised the specter of a major conflict.

Ukraine said its vessels were operating in line with international maritime rules, while Russia alleged they had failed to get permission to pass.