News of the day from around the world, July 21

1 Libya fighting: The self-styled Libyan National Army declared “zero hour” Saturday in its offensive to capture the capital, Tripoli, from the U.N.-backed government. The LNA, led by commander Khalifa Hifter, called on the people of Tripoli to work with its forces. Meanwhile, the internationally-recognized government in Tripoli issued a statement saying it had gathered intelligence about possible air strikes by LNA forces against key sites in the capital, including the airport. The Government of National Accord in Tripoli said strikes by Hifter’s allies — including Egypt, the United Arab Emirates and France — were likely. Libya sank into chaos after Moammar Khadafy’s 2011 ouster and is now divided between the rival administrations.

2 Egypt flights: British Airways abruptly canceled all flights to Cairo on Saturday for what it described as security reasons. “We constantly review our security arrangements,” the airline said in a statement, “and have suspended flights to Cairo for seven days as a precaution to allow for further assessment.” The airline did not describe the security issue. Egyptian officials said all other airlines were operating as usual. The British government had released new travel advice for Egypt on Friday, warning against trips to most of the Sinai Peninsula and the area west of the Nile Valley and saying that travelers to Cairo should be cautious, too.

3 Islamic State: Iraq’s military says its troops are partnering with paramilitary forces to clear remnants of the Islamic State group north of Baghdad and surrounding areas. The offensive opened Saturday is the second phase of operation dubbed “Will to Victory.” The military said the new target area is north of Baghdad and in Diyala, Salahuddin and Anbar provinces. The...