UN High Commissioner for Human Rights Michelle Bachelet on Sunday denounced numerous violent acts along Venezuela’s borders with Colombia and Brazil resulting in at least four deaths and more than 300 injuries on Friday and Saturday.

Bachelet received numerous reports of violent incidents along the borders as Venezuelan security forces and pro-government groups attempt to halt aid supplies coming into Venezuela through closed border points.

Bachelet says people have been shot and killed and have suffered injuries from which they will not recover. “These are disgraceful scenes. The Venezuelan government must stop its forces from using excessive force against unarmed protesters and ordinary citizens.”

Additionally, the High Commissioner urged the government to rein in the involvement of armed pro-government elements and to arrest those who attacked unarmed protesters.

“The use of proxy forces has a long and sinister history in the region. … The Government can, and must, stop them from exacerbating an already highly inflammable situation.”