Who is responsible to repair water damage from a leak in a Condo?

I am the owner of a Condo on the 2nd floor of a two-story condo building. I have been informed this morning by my downstairs neighbor that their bathroom ceiling has water damage and they believe it is from a leak in my bathroom, which lies directly above theirs. I have contacted a plumber and the current tenant to schedule a time tonight when the plumber can come to the condo and determine where the leak is coming from. If the leak is coming from a pipe that I am responsible for I am going to pay the plumber to resolve the issue. However, as I have just found out about this issue a few hours ago and I am doing everything in my power to get the issue resolved, am I liable to pay for the repairs to the unit below? P.S: If the leak is found to be coming from a "Common Pipe" the Condo Association will be responsible to repair the pipe and all damages. Thank you