APS reports that the lights are on, but phone service still out at some West Side schools.

Power was restored at West Side schools at 8:10 a.m. but phone service was reported to be out, according to the Albuquerque Public Schools Web site.

Classes were to begin as normal, APS said.

The outage was caused by a transmission line failure, knocking out power to about 11,000 customers, but half those customers had their power back within the first 30 minutes, Public Service Company of New Mexico spokeswoman Susan Sponar told ABQjournal.com.

The cause of the outage remains unknown, Sponar told us.

The affected area was between Paseo on the south, 14th Street on the north, Ventana Ranch on the west and Golf Course Road on the east, Sponar said.

8:20am -- Power Out at West Side Schools: Lights went out for about 11,000 on West Side; PNM expects to have fully restored by 9 a.m.

Albuquerque Public Schools reports on its Web site that a power outage has affected several West Side schools, including 7-Bar, Sunset View, Tierra Antigua and Ventana Ranch elementary schools, James Monroe Middle School and Volcano Vista High School, but APS says classes will take place as scheduled.

APS also reports that Public Service Company of New Mexico is assuring them that power will be restored by 9 this morning, according to the Web site.

According to KOAT-TV, power went out to about 11,000 West Side customers around 7 a.m., but PNM told Action 7 News around 8 a.m. that half those customers had their power restored.

The areas affected were Ventana Ranch, Golf Course, Paseo and 14th Street, KOAT-TV reported.