Twelve people were killed and 18 others injured in a storm that brought rain, hail and winds of more than 90 kph (56 mph) to greater Buenos Aires, Argentine authorities said Thursday.

Residents of the capital and its suburbs woke up to flooding and streets blocked by downed trees and light poles.

The storm also cut electricity to some neighborhoods and interrupted passenger rail service, while transportation in general was snarled amid heavy Holy Week travel.