The Russians have increased the deployment of a missile system that the US says violates a 1987 treaty on intermediate-range nuclear forces, an agreement the Trump administration canceled Friday, a new report said.

The US has told Western allies that Russia now has deployed four battalions of the 9M729 cruise missile, an increase from the three battalions Russia was said to have a few months ago, the Wall Street Journal reported, citing a senior Western official familiar with US intelligence reports.

Russia is believed to have nearly 100 of the missiles, including spares, the official told the paper.

The development came as Secretary of State Mike Pompeo announced Friday that the US was withdrawing from the Intermediate-Range Nuclear Forces Treaty, a major pact with Russia that has played a key role in European security since the Cold War.

“There’s no mistaking that the Russians have chosen to not comply with this treaty,” Pompeo told reporters at the State Department in announcing the administration’s decision to pull out of the Reagan-era treaty.

“For years, Russia has violated the terms of the Intermediate-Range Nuclear Forces Treaty without remorse,” he said.

The withdrawal process takes six months, so it’s possible that Russia could change course and meet US demands that they destroy the missiles and their launchers.

Russia has complained that a US anti-missile system in Romania also could be used to fire missiles banned under the INF treaty.

Washington sees the allegation as an effort by Moscow to distract from its own cheating, the Journal reported.

The treaty banning ground-based American and Russian intermediate-range missiles, signed by President Ronald Reagan and Soviet leader Mikhail Gorbachev, was seen as one of the arms control accords that helped end the Cold War.