Riot police clash with New Zealand anti-vax protesters

New Zealand anti-vaccine protesters pelted police with a "stinging substance" sending three to hospital with injuries Tuesday, as tensions spilled over in an angry weeks-long protest.

Prime Minister Jacinda Ardern decried "absolutely disgraceful" scenes after the suspected acid attack, and a startling incident that saw one protester speed a car toward police lines before coming to a quick halt just centimetres away.