Seeing some tweets about this.

Hong Kong Police Use Tear Gas On Large Pro-Democracy Protest

Police in riot gear have been deployed to the streets of Hong Kong, where thousands of protesters are calling for free elections. Police used tear gas and pepper spray to try to clear the city’s central business and government district. Organized by student groups, the Occupy Central protests have now been going on for three days.

Sunday night brought the first use of tear gas; video footage from earlier in the day showed protesters using umbrellas to try to deflect pepper spray and water cannons as officers attempted to disperse the crowd. Some protesters also worried that police might also use a “sound cannon” to send painful acoustic waves at them.