PITTSBURGH — A Pittsburgh police officer is on administrative leave after shooting and killing a man suspected of stabbing another man.

Fifty-nine-year-old Aucy Andrews was shot and killed after he refused several orders to halt his armed advance on a police officer who arrived at the scene in response to the original stabbing.

Police say Andrews was armed with a knife. They say he tried to stab a police dog during the incident and advanced on the officer. The policeman has been with the Pittsburgh Police for eight years. His name has not been released.

Pittsburgh Police Chief Nathan Harper says the policeman is on administrative leave because it's "hard to take a life."

GLENSHAW — Teachers at the Shaler School District will go on strike immediately after Thanksgiving if they fail to reach a contract deal.Superintendent Donald Lee announced the plans to launch a strike beginning Nov. 27 in a notice posted on the district's Web site. The notice says there are two negotiating sessions scheduled before the strike date and the sides hope to reach a deal that will prevent a walkout.Teachers have been working without a contract since June 30. The strike will keep nearly 5,300 students out of school. The district serves areas about 10 miles north of Pittsburgh.Pennsylvania teachers are allowed to strike, but must provide 180 days of instruction by June 15.

HARRISBURG — Police are trying to find the mother of a newborn boy found abandoned outside a home in Harrisburg.The full-term infant was alive and breathing on his own Saturday evening. He was taken to an area hospital, where it is said to be doing fine.The resident of the home where the baby was found reported hearing the doorbell ring sometime after 7:20 p.m.The woman opened the door and found the baby on the porch and wrapped in a towel.Police say the child appears to be African-American and may have been born shortly before he was found.Police say they have no information about who the mother is or where she could be, but say they are worried about her health. Chief David Hiester says he doesn't expect to file any charges.

PITTSBURGH — Forbes Field is being reborn as part of the model train exhibit at the Carnegie Science Center.The original baseball stadium opened in 1909 as the home of the Pittsburgh Pirates and was torn down after the team moved to Three Rivers Stadium in 1970.Science center officials say the ballpark model will be 1/64th the size of the original. The recreated park features a crowd made from 23,000 cotton-tipped swabs and an animated batter that swings.Tiny players representing the Chicago Cubs and Pittsburgh Pirates grace the field.The Miniature Railroad & Village exhibit reopens Nov. 23.