McKinney fire officials say an overnight blaze at a Planned Parenthood clinic was started by a Molotov cocktail.
The health center on Eldorado Parkway was attacked Tuesday night at about 10 p.m.
Firefighters arrived to extinguish the fire and discovered a wine bottle filled with diesel fuel and a rag for a lighter.
Officials said the fire damaged the exterior of the building but did not penetrate it. Investigation into the attack is ongoing.
The clinic opened in 2008 and has been the site of multiple protests. This is the first serious attack at the location.