World News Update, what you need to know

Greek Prime Minister Alexis Tsipras has vowed to push ahead with a bailout referendum despite pressure from European leaders, and urged creditors to accept a fresh reform offer.

ELSEWHERE:

CAIRO - Jihadists have launched an unprecedented wave of attacks on Egyptian soldiers in the Sinai Peninsula that killed at least 70 people.

WASHINGTON DC - US President Barack Obama has announced that the United States and Cuba will re-establish full diplomatic relations, severed 54 years ago.

ADEN - Rebel fire on a residential district of Yemen's second city Aden has killed more than 30 civilians, local officials say.

SYDNEY - A 5.8-magnitude earthquake has struck off the Solomon Islands, US geologists say, but there were no initial reports of damage and no tsunami warnings were issued.

MIAMI - Hydroelectric dams may cause 70 per cent of wildlife in the nearby area to go extinct, according to a study that raises new concerns about what is often touted as a green energy source.

OCRACOKE - A shark has bitten a 68-year-old man several times in waist-deep water off the coast of North Carolina, the seventh attack in the state's coastal waters in less than three weeks.

WASHINGTON DC - Hotter temperatures are messing with the gender of Australia's bearded dragon lizards, a study says.