>> Four people have been arrested in counterterrorism raids in Sydney. Armed police and riot squad officers swooped in on properties in various suburbs of the Australian city late on Saturday. The operation was aimed at disrupting plans for what officers are calling terrorist attacks. Federal police said the raids related to an ongoing investigation.
Australia, a close ally of the United States, has been on heightened alert for attacks by homegrown militants returning from fighting in the Middle East since 2014. Authorities say they've thwarted a number of potential incidents since then. But there have been several lone wolf assaults, including a cafe siege in Sydney that left two hostages and the gunman dead.
The country's immigration minister said about 100 people have left Australia for Syria to fight alongside organizations like Islamic State.