Authorities have identified the two boys as Dan Tadrzynski and Perry Krewson, both 18, according to NBC Philadelphia. They decided to go for a swim near the local train station when they began to struggle against the current.
Fred Harran, Bensalem's director of public safety, told reporters that a third teen was able to make it safely out of the water.
"He had struggled to get out and he saw one of the other gentlemen struggling to get out. And when he got out, they did not," Harran said.
Harran warned others from attempting to swim in the creek, which can be more dangerous than its relatively mild name suggests.
"Still water is dangerous in these creeks, but raging water is especially dangerous. You just shouldn’t go in, nothing good can come from that."
Both teens had just graduated high school, while Krewson was headed for Marine boot camp.
Notable deaths of 2014 [PHOTOS]