Serbian President Stepping Aside as Party Leader Amid Mass Protests and Ethnic Clashes

Tens of thousands rallied in Serbia's capital in support of President Aleksandar Vucic following mass shootings that killed 18 people.
Ethnic Serbs in northern Kosovo clashed with police trying to prevent recently elected ethnic Albanian officials from entering municipal buildings.
Vucic put Serbian troops on high alert and ordered them to move closer to the border with Kosovo in response.
The US and European allies criticized both Kosovo and Serbia for escalating tensions.
Vucic announced he is resigning as head of Serbia's ruling party but will remain president amid plans to form a new political movement.