Washington DC [US], July 2 (ANI): The Trump administration is pausing some weapons shipments to Ukraine, including air defense missiles, following a review of military spending and American support to foreign countries, a senior White House official told CNN.

Defense Secretary Pete Hegseth signed off on the review, which the official noted had been underway for months. It was not immediately clear if military support provided to other countries would be affected.

White House Deputy Press Secretary Anna Kelly said the decision was made 'to put America's interests first.'

The decision to halt some weapons transfers to Ukraine comes after President Volodymyr Zelensky pleaded with Western allies to bolster its aerial defenses after intensifying Russian airborne attacks, CNN reported.

Russia has in recent weeks launched near-nightly air attacks on Ukraine, involving hundreds of drones and missiles. On Sunday, the Ukrainian military said a pilot was killed after his F-16 fighter jet crashed during a Russian aerial assault.

Following the attack, Zelensky said on social media Ukraine is ready to buy 'American systems' to strengthen its air defenses.

The US has been the biggest single donor of military aid to Ukraine since Russia launched its full-scale invasion in 2022, supplying Ukraine with air defense systems, drones, rocket launchers, radars, tanks and anti-armor weapons, leading to concerns over dwindling US stockpiles.

But the balance of aid to Ukraine has changed significantly since Trump returned to power, casting doubt over the future of US support for Kyiv.

In April, Europe surpassed the US in total military aid to Ukraine for the first time, with its contribution equaling 72 billion Euros ($84.9 billion), compared with the US's 65 billion Euros ($76.6 billion), according to data from the Kiel Institute for the World Economy, a German think tank that closely tracks wartime aid to Ukraine.

The shift came after Trump halted all shipments of military aid to Ukraine following a heated Oval Office argument with Zelensky in March. Trump resumed aid flows to Ukraine about a week later.

Last week, during the NATO summit in The Hague, US President Donald Trump suggested Kyiv may see future Patriot missile system deliveries from the US - signaling a possible shift in his thinking about US aid flows to Kyiv, CNN reported.

The Patriots are widely considered among the best air defense systems, particularly in protecting against advanced hypersonic and ballistic missiles.

Ukraine is known to have roughly half a dozen of the US-made Patriot air defense systems, which play a crucial role in its air defense, protecting millions of civilians from Russian missiles.

But Kyiv is at risk of running out of missiles for these systems. (ANI)