The wayward swine go loose from a truck heading north along the interstate near Exit 77 (PA 39 Mandala Hill/Hershey) shortly after 7 a.m., on Thursday, August 18, police say.
The rear gate of the hauler came open allowing the pigs the escape, but the driver was able to pull over to a rest area before additional pigs hopped off, according to a release by the police.
"Unfortunately due to injuries and safety concerns, the pigs had to be euthanized," police say.
No crashes or human injuries were reported.
The traffic cleared at 9:40 a.m., according to 511pa.
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