Paolo Zialcita

Sanna Marin is set to become Finland's third female prime minister — and its youngest — leading a coalition of four other parties, all headed by women.

At just 34, she will also stand out on the world stage by being the world's youngest sitting prime minister.

Marin was nominated Sunday by her Social Democratic party after its leader, Antti Rinne, stepped down after losing the confidence among his coalition government over his handling of a postal strike.

Updated at 11:35 a.m. ET on Saturday

A pair of armed robbers and two others, including the driver of a hijacked UPS truck, were killed in an exchange of gunfire with South Florida police officers after the suspects led authorities on a high-speed chase.

O Christmas tree, o Christmas tree. How lovely are thy branches.

Those are the lyrics to a popular Christmas carol about a tree so wondrous it roused musicians to write an entire song about its green boughs and unchanging leaves. But this year, one London Christmas tree isn't exactly inspiring people to burst into holiday carols.

Users on Instagram will soon be required to enter their birth date in order to use the social networking app. The Facebook-owned company previously only checked that the new user was at least 13 years old.

The changes are being made in the hopes of making the platform safer for younger users, Instagram said in a statement. The birth dates will be used to recommend different privacy settings and features. Birthdays will not be visible to the public.

A prominent Japanese doctor who devoted his life to providing aid in Afghanistan was killed by unknown gunmen on Wednesday along with five Afghan colleagues. It's the second attack on aid workers in the country in recent weeks.

Officials said Tetsu Nakamura, 73, was attacked while riding in an aid vehicle in the eastern Afghan city of Jalalabad. He died of his wounds while he was being airlifted to a base for emergency care.

So far, there has been no immediate claim of responsibility for the attack. The Taliban denied involvement; ISIS is also active in the area.