DOHA, Qatar — Escalating a feud among Persian Gulf monarchs, Saudi Arabia and the United Arab Emirates on Friday listed 59 people and a dozen organizations said to have links to Qatar, including prominent Qatari businessmen, politicians and royalty, as aiding terrorism.

The move came on the same day the United States sent mixed messages about the deepening crisis: Just minutes after Secretary of State Rex W. Tillerson urged calm and an easing of the embargo on Qatar, President Trump again publicly accused the country of funding terrorism.

Qatari officials have repeatedly denied supporting terrorist groups and said the emirate works closely with Western security agencies to crack down on terrorist financing.

The decision of the Saudis and Emiratis to release the list deepened a five-day standoff that has already included a cutoff of all diplomatic relations, travel and trade with Qatar, forcing it to import critical food supplies by air from Turkey and elsewhere.