Venezuelan security forces are stepping up their presence in the coastal city of Cumana after more than 20 businesses were violently ransacked in another day of unrest across the crisis-wracked country.

Authorities on Wednesday said around 400 people were detained during protests a day earlier that witnesses said were sparked by food shortages.

Following the vandalism, the city's mayor suspended the use of motorcycles for 72 hours.

A wave of lootings and food riots in crisis-hit Venezuela has left at least three people dead in the last week. Around 10 looting incidents are occurring daily across Venezuela, according to the Venezuelan Observatory of Violence.