Roberto Martinez told NBC News that his sister, Alejandra Villanueva, was killed in the attack at the Blue Parrot nightclub in Playa Del Carmen.
Russia hopes for cooperation with the Trump administration on "strategic stability" and hacking allegations are "false," its foreign minister said.
Alejandra Villanueva, 18, was named among the victims after gunfire broke out at a dance event in a Mexican resort.
Tens of thousands of protesters are preparing to take to the streets of Washington D.C. during the 45th president's inauguration week.
Officials said the search of vast swaths of the Southern Indian Ocean had come up empty, and 'accordingly, the underwater search for MH370 has been suspended.'