Authorities in Bolivia say a drunk driver has run into a protest by people with disabilities, killing two of them.

Four other people were injured Thursday in the Bolivian city of Cochabamba.

The demonstrators have been protesting in their wheelchairs and crutches since March 21 to demand a hike in annual government aid that now amounts to about $143. They staged protests near the presidential palace in the Bolivian capital and also slept on a tent in the middle of an avenue in Cochabamba.

Police arrested a 21-year-old female driver and a passenger. The government says the driver crashed her car into a security barrier protecting the tents.

The group representing the demonstrators is calling for a national day of mourning and is holding a wake.