April 26 (UPI) -- The toll from a recent wave of narco-terror violence in southwestern Colombia has risen to 20 civilians killed and 36 more injured, the region's governor said Sunday.

The dead include 15 women and five men, all adults, while three of the 36 people injured remain hospitalized in intensive care units, according to Octavio Guzmán, governor of the department of Cauca.

The spate of at least two dozen incidents aimed at civilians during a two-day period are blamed on dissident factions of the former Revolutionary Armed Forces of Colombia that still operate in Cauca state.

The wave escalated sharply on Saturday when an explosive device was detonated at Cajibio along the Pan-American Highway, killing 19 civilians and injuring more than 20 on a passing bus.

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