Costa Rica's Turrialba volcano has erupted for the first time in more than a century, spewing ash and prompting the evacuation of a small group of people living in nearby communities.

Authorities monitoring Turrialba's activity increased a volcano alert level Wednesday, saying "intense" but "low" seismic activity continued in the crater area. 

Officials also say winds could blow some of the ash from the 3,328-meter volcano toward the Costa Rican capital, San Jose.

Some information for this report was provided by AP, AFP and Reuters.