EU vows to act if energy lines hit as firms ramp up security
BRUSSELS (AP) — The European Union suspects that damage to two underwater natural gas pipelines  was sabotage and is warning of retaliation for any attack on Europe’s energy networks, a senior official said Wednesday, as energy companies began ramping up security. 
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### Instruction: EU vows to act if energy lines hit as firms ramp up security

### Response: BRUSSELS (AP) — The European Union suspects that damage to two underwater natural gas pipelines  was sabotage and is warning of retaliation for any attack on Europe’s energy networks, a senior official said Wednesday, as energy companies began ramping up security. 