December 29, 2014 11:13 PM EST

Four people were killed Monday by a lightning strike on a popular beach in Brazil, during a sudden storm off the coast of São Paulo.

Citing local media, the BBC says the four included a pregnant woman and were from the same family.

Four other people were injured and taken to hospital, with two said to be in a serious condition.

The victims were sheltering from the heavy rain under a kiosk on Praia Grande beach, near the port city of Santos, when they were struck.

An earlier storm on Monday tore down trees and power lines across São Paulo state, causing transport chaos.

[BBC]

Write to Helen Regan at helen.regan@timeasia.com.

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