Accusation comes as UK and Saudi Arabia sign preliminary deal for sale of 48 Typhoon fighter jets
Anti-war campaigners voiced outrage at the deal at a time of Saudi involvement in the war in Yemen.
Saudi Arabia is targeting children in the brutal war in Yemen with a "growing sense of impunity", a charity chief has warned as the country's key power player completed a high-profile visit to the UK.
The United States has the leverage to pressure our ally Saudi Arabia to work on an agreement in Yemen and guide them to play a stabilizing and constructive role in the Middle East.
The United States sold more than $650 million in weapons to Saudi Arabia and the United Arab Emirates as the Yemen war expanded last year, according to a study.
Yemen Watchnet