The Prime Minister tweeted: "The UK’s thoughts are with the victims and the emergency services responding to the appalling attack in Las Vegas.
The Foreign Office released the following statement:
"I am horrified by the awful attack at a music festival in Las Vegas this morning. The United Kingdom stands with the American people against this indiscriminate violence. My thoughts are with all those caught up in it.
"The Foreign and Commonwealth Office is in contact with Las Vegas authorities to establish whether any British people were caught up in the attack and we are ready to help however we can. Any British people in Las Vegas should follow the instructions of local authorities."
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