MAULDIN - A South Carolina high school has closed after students returned from a band trip to Walt Disney World in Florida with flu-like symptoms.

Greenville County School District spokesman Oby Lyles says officials decided to close Mauldin High School on Thursday as a precaution after 18 of 70 students returning from the trip reported illnesses. Lyles says the district is waiting for test results from state health officials.

A Department of Health and Environmental Control spokesman said he could not immediately comment on the school closing.

DHEC has identified 17 "probable" cases of swine flu, all linked to students at a private school in Newberry who had been in Mexico in early April. The school has been closed this week.

DHEC is investigating dozens of "suspected" cases of swine flu.