Some 4,000 migrants, who crossed the border from Greece to Macedonia, arrived in Serbia on Sunday heading toward western Europe, local media reported.

MOSCOW (Sputnik) – On Saturday, several thousands of migrants stranded for days on Greece's border with Macedonia broke through police lines and entered the Balkan nation.

At least 2,000 people arrived at a migrant reception center in the Serbian southern town of Presevo Sunday morning, Radio Television of Serbia (RTS) reported. Another 2,000 reached the nearby village of Miratovac, the broadcaster added.

According to the RTS, the migrants get the papers at the reception center and then board buses to Belgrade.

It is expected that all the migrants, crossing from Greece to Macedonia, will head north toward western EU countries, the broadcaster said.

The situation in Macedonia's south escalated after the number of migrants at its border with Greece, mostly from Syria, Afghanistan and Pakistan, had reached about 5,000.

On Thursday, Macedonia declared a state of emergence on the borders to cope with the influx of migrants. The day after, police used stun grenades, rubber bullets and tear gas against the migrants, trying to enter the country from Greece.