HOUSTON, Texas (CNN) -- NASA evacuated a building at the Johnson Space Center in Houston after an employee with a gun was seen and a shot was fired, a NASA spokesman said Friday.

A SWAT team with the Houston Police has been dispatched to building 44 on the Johnson Space Center property, a source told CNN. Building 44 holds a laboratory.

The call for help came in to the Houston Police at 1:40 p.m. (2:40 p.m. ET) but it's unclear who made that call.

NASA spokesman James Hartfield said all of the employees that would have been in that building have been evacuated.

There is "extremely tight security" at Johnson Space Center, Hartfield said.

A NASA spokesperson told CNN that all employees have been told to go home for the day.

Space Center Intermediate School, less than a mile south of building 44, has been locked down, said Karen Permetti, spokeswoman for Clear Creek Independent School District.

She said the school lets out at 4 p.m. (5 p.m. ET) and parents have been asked not to come to the school to pick up their children.

The school has about 1,200 students, according to the school district.

http://www.cnn.com/2007/US/04/20/nasa.gunfire/index.html

What the !@#$%^&*] is wrong with people!!!!!!!!!!!!!!!

, Wow, this just seems to be a bad week overall! This week in April always goes down with some sh!t almost every year now?

What the [!@#$%^&*] is wrong with people!!!!!!!!!!!!!!!

These people are all starting to scare me, heck in one county alone in my state today 20 schools were closed due to threats of a shootout, and it seems like every 5 minutes you hear of more stories like this all across the country.

This is ridiculous. Civilization is going straight down the shitter.

CNN is reporting that within the last half hour, the gunman killed a male hostage and himself. Negoiators were talking to him and heard a gunshot and made the decision to go in.

This is just too fucked up. I would really like to know how this person got into the Johnson Space Center.

Oh my god. Some people are sick. This is getting to be insane.

Just goes to show that no matter how many haters you may kill, you'll never kill the hatred.

And yet lax fire arm laws are still in place...when is the American government going to wake up and do something about this?