ZAMBOANGA CITY, Philippines—Authorities confirmed the first case of Influenza A (H1N1) here Thursday morning but officials at the 9-year-old boy's school said they were not suspending classes yet.

Aristides Tan, Western Mindanao health chief, said the boy probably got the disease when he and his parents visited a relative in Manila who was infected with the virus late last month.

"Yes we have a confirmed case. He is now recovering," he said.

Tan said contact tracing had been started.

Ateneo De Zamboanga president Father Antonio Moreno said the school will wait for the advice of the Department of Health before deciding about suspending classes.

The boy was the fourth confirmed H1N1 case in Mindanao since last month.

Earlier, health officials in Caraga confirmed that a boy, who vacationed with his parents in Hong Kong, became the first victim.

A girl who had contact with the boy also became ill.

Then in Kidapawan City, officials confirmed that a 37-year-old woman who fetched her husband from Manila also caught the virus.