More Western nations called on their citizens to be cautious in the Philippine capital on Saturday following a U.S. embassy warning a day earlier of an unspecified threat against Americans.

The warnings issued by the British, Canadian and Australian governments called on their citizens to be cautious amid fears they could get caught up in an attempted attack against Americans.

Al-Qaida linked Shebab rebels said on Saturday that they have abandoned the southern Somali port city of Kismayo, their last bastion in the country, a day after an assault by African Union troops.

"The military command of Shebab mujahedeen ordered a tactical retreat at midnight," Shebab spokesman Ali Mohamud Rage told Agence France Presse.

Ten people, including a young girl and an elderly woman, have died in Spain as a result of floods brought on by downpours, regional officials said on Saturday.

Five people died in the Andalusia region -- a woman in her 80s, a couple found in their car, a man who died of a heart attack and another man in the village of Archidona, near Malaga.

Iran's foreign minister on Friday demanded that the U.N. Security Council act against the countries that killed Iranian nuclear scientists and launched cyber-attacks against its atomic research.

Without naming Israel or the United States, which Iran has accused over the killings of four scientists, Foreign Minister Ali Akbar Salehi said Iran had been a victim of "nuclear terrorism."

Russia's anti-drug chief expressed fear Friday that drug trafficking from Afghanistan would increase after the pullout of NATO troops in 2014, saying the country stockpiled enough narcotics to keep the trade going for another decade.

"We estimate that opiates from Afghanistan make up 30 percent of all narcotics in Russia," said Viktor Ivanov at a meeting with anti-drug officials from Pakistan, Afghanistan, and Tajikistan in the Tajik capital Dushanbe.

A gunman opened fire at a small business in the northern U.S. state of Minnesota, killing four people before turning the gun on himself and dying of a self-inflicted gunshot, police said Friday.

Four other people were taken to hospital, three of whom were in critical condition.

Monsoon floods in Pakistan have killed 371 people and affected nearly 4.5 million, the government disaster relief agency said on Friday.

Pakistan has suffered devastating floods in the past two years, including the worst in its history in 2010, when catastrophic inundations across the country killed almost 1,800 people and affected 21 million.

The United States issued a security alert for the Philippine capital of Manila on Friday, warning its citizens they could be the target of an unspecified attack.

The U.S. embassy in Manila released a statement calling for U.S. citizens to exercise extreme caution and consider canceling American gatherings in the sprawling and chaotic megacity of 15 million people.

The Chinese embassy in Tokyo has received a bullet in the post, with the sender giving their name as the Japanese prime minister, police and reports said Friday, amid a festering territorial row.

An envelope containing the rifle bullet arrived at the embassy on Thursday morning, Jiji Press said.

Ecuador said Thursday that Britain could grant safe passage to WikiLeaks founder Julian Assange under an extradition treaty between the two countries dating back to the 19th century.

The treaty -- signed September 20, 1840 -- makes it possible to "demonstrate to the United Kingdom that it can deliver safe passage," Ecuador's foreign minister, Ricardo Patino, told South American broadcaster Telesur.