Overnight Russian attacks on Kyiv and the surrounding region killed at least 4 people, one of which was a 3-year-old child, officials said Saturday.

Oleksiy Yukov spent two decades recovering the bodies of soldiers – including many Russians. He was killed during a recovery mission after stepping on a landmine.

The United States pledged $1 billion in security assistance to Colombia after its new right-wing president took office. Abelardo de la Espriella, a millionaire lawyer with a taste for spectacle, took office Friday for his four-year term after a campaign focused on anger and fears about security.

The attacks came a day after at least 30 Yemeni government troops were killed in strikes on military camps in Marib and Hadramawt provinces, according to government sources, in one of the deadliest escalations in months.

A rampage at a high school in Thailand on Friday was the latest episode of gun violence in a country that has grappled in recent years with several attacks.

A drone carrying explosives entered Bulgaria from neighboring Romania and detonated near a major international gas pipeline on Saturday, prompting heightened surveillance along the border between the two NATO members.

Iraqi authorities said Saturday that they are investigating an explosion that struck a base belonging to the Popular Mobilization Forces, a coalition of Iran-allied militias, overnight, killing one person and injuring eight.

Belgrade will support Ukraine's independence and aims to improve economic cooperation ‌between the two countries, President Aleksandar Vucic said on Saturday, but he stopped short of any pledge to impose sanctions on Serbia's long-time ally Russia.