PIERRE, S.D. -- South Dakota Gov. Dennis Daugaard says he hopes people who exercise their First Amendment rights will do so peacefully after a Nebraska commission approved a Keystone XL oil pipeline route through that state.

Daugaard said Monday he will continue supporting the proposed pipeline as long as it can be built and operated safely. But Daugaard says he recognizes some residents are disappointed by Nebraska鈥檚 decision.

Sen. Mike Rounds says he supports Keystone XL and other pipelines, but says he鈥檚 concerned about an estimated 210,000-gallon oil spill last week from the existing Keystone pipeline in South Dakota.

TransCanada wants to build the nearly 1,200-mile Keystone XL pipeline from Canada through several states, including South Dakota.

Sisseton Wahpeton Oyate Chairman Dave Flute says members are 鈥渉ighly disappointed鈥 with Nebraska鈥檚 move considering the oil spill near their reservation.