President Donald Trump and Secretary of State Marco Rubio are questioning Britain's handling of a suspected plot against a US air base after five men arrested in the case were released on bail, according to Google News US.

The men had been detained in connection with an alleged plan targeting the base. Their release on bail has drawn scrutiny from Washington, with top US officials suggesting the move raises concerns about how seriously London is treating the threat.

Trump and Rubio both publicly raised questions about the UK's approach to the case. The details of the suspected plot, including which air base was targeted and when the arrests took place, were not immediately clear from the initial report.

The involvement of a US military installation makes the case a direct American security matter. US air bases in the UK host thousands of American personnel and are central to transatlantic defense operations.

Rubio's comments carry weight because the State Department oversees US relations with London and coordinates on counterterrorism efforts. A public dispute over a security case can strain the close intelligence-sharing relationship between the two countries.

The release of suspects on bail does not mean charges have been dropped. In the UK legal system, bail can be granted while investigations continue, but US officials appear to view the decision as a sign of insufficient urgency.

Neither the White House nor the UK government immediately issued detailed statements on the specific concerns raised. The case adds to a recent pattern of friction between Washington and London over security and legal matters.

Trump has repeatedly criticized allied governments over defense spending and immigration policies. This episode fits that pattern, with the president and his top diplomat now applying public pressure on a close ally over a case tied to American military assets.

It was not immediately known whether the US has requested the men be kept in custody or whether extradition discussions are underway. The UK Home Office and the US Embassy in London did not immediately respond to requests for comment.

The story is developing. Lawmakers on both sides of the Atlantic are likely to press for more information about the alleged plot and the decision to release the suspects.