US Secretary of State John Kerry will travel to Egypt and the Gulf next week for talks on the recent nuclear deal between major powers and Iran and the fight against Islamic State militants, then he will head to Southeast Asia, where countries share US concerns about China's pursuit of territorial claims.

Turkey and the United States are working on plans to provide air cover for Syrian rebels and jointly sweep Islamic State fighters from a strip of land along the Turkish border, bolstering the NATO member's security and possibly providing a safe haven for civilians.

Democratic presidential candidate Hillary Clinton called on July 26 for a dramatic national shift to energy sources such as solar and wind, setting a goal of generating enough clean renewable energy to power every US home within a decade after she takes office.

Bobbi Kristina Brown, the only child of late singer Whitney Houston, died on July 26 at the age of 22, some six months after suffering irreversible brain damage in an incident at her suburban Atlanta home, her family said in a statement.

Three people were killed when a small airplane crashed into a residential area of the Japanese capital, Tokyo, on July 26, public broadcaster NHK reported, setting fire to houses and cars.

Two Turkish soldiers were killed and four were in injured by a car bomb and homemade explosives near the southeastern city of Diyarbakir overnight, the military said on July 26.

The Lebanese Hezbollah group believes it can still count on Iran's support following Tehran's nuclear deal with world powers, leader Sayyed Hassan Nasrallah said on July 25.

Turkish fighter jets launched attacks on camps of the militant Kurdistan Workers Party (PKK) in northern Iraq overnight, the prime minister's office said on July 25, in what is likely to be a major blow to the stalled Kurdish peace process.

A Saudi-led airstrike on Yemen's Taiz killed at least 55 people and left tens injured, Houthi-controlled news agency Saba said on July 25.

Talks on tying up a new bailout deal for Greece failed to start on July 24 as had been expected, with officials blaming security worries for delaying the negotiations with international creditors who are detested by many Greeks.