Wichita ? A 17-year-old Nickerson High School student was arrested after several homemade explosive devices detonated in south-central Kansas, destroying mailboxes and shattering a car windshield.

It appears some of the intended targets were school employees, officials said.

The student, Marcus Curran, 17, was arrested Friday as he ate lunch at the high school, said Reno County Sheriff Randy Henderson. He was later booked into juvenile facilities on five counts of arson and two counts of attempted arson.

A hearing was planned for next week to determine whether to try him as an adult or a juvenile. Charges may also be filed in Rice County, where two of the devices were found.

Henderson said investigators thought the 17-year-old was the one who made the devices.

Henderson said his officers went to the 300-student high school to question another student, but that student was not in class Friday. He would not say whether other arrests were planned.

The first reported explosion occurred Jan. 16 in Hutchinson, and subsequent explosions were reported in Nickerson, Sterling and rural Reno County. The last explosion was reported Friday after news of the student’s arrest was made public. The device had detonated earlier in the week, Henderson said.

Teachers and other school district employees were relieved after learning of the arrest, said Jerry Burch, Nickerson schools superintendent.

“It is a scary thought to think that you might have been targeted,” he said.

Two of the devices were found outside the homes of Nickerson teachers, Henderson said, and another outside the home of a school secretary. One of the devices was found on the football field at Nickerson High School.

Henderson said three of the 10 were duds. The five devices that exploded were powerful enough to destroy mailboxes, he said, and one shattered the windshield of a car owned by one of the teachers. The sheriff’s department reported that officers have found explosion debris as far away as 50 feet. Luckily, Henderson said, no one was hurt.

Two other devices were found unexploded, one by a postman and another by a person who went to his mailbox to retrieve his mail. Neither of the unexploded devices were found at the homes of school employees.

“After interviewing the student,” Henderson said, “we think all the devices have been found.”