Senator Rick Scott, the ex-governor of Florida, called for a review of training programmes for foreign military personnel on US 
soil.

"We shouldn't be providing military training to people who wish us harm," he said.

The US defence secretary, Mark Esper, said he wanted to make sure that vetting was adequate.

"I want to make sure that we're doing our due diligence to understand: What are our procedures? Is it sufficient?" he told 
reporters.

Meanwhile Saudi officials have continued to condemn the attack, including vice-minister of defence, Khalid bin Salman, who 
said he trained at a US base like many others in the Saudi military.