A British diplomat has resigned over the UK’s “complicity in war crimes” in Gaza, saying there is “no justification” for the UK’s continued arms sales to Israel, Anadolu reports.

A resignation letter, criticising the government’s continuing arms sales to Israel was reported by media on Friday, attributed to Mark Smith, a diplomat working at the Foreign Office.

The BBC confirmed that the diplomat is indeed Smith who worked on counterterrorism and has resigned in protest of arms sales to Israel.

“It is with sadness that I resign after a long career in the diplomatic service … I can no longer carry out my duties in the knowledge that this Department may be complicit in War Crimes,” read the letter.

The Foreign Office is said to have declined to comment on the individual case, saying the government is “committed to upholding international law.”