Republican Karen Handel said on Thursday law enforcement are investigating the delivery of threatening letters and a suspicious substance to her home in suburban Atlanta and those of some of her neighbors.

Just one day after the targeted shooting of Republican members of Congress rocked Washington and five days before voters in Georgia's sixth district go to the polls, local law enforcement were investigating possible attempts to intimidate Handel.

Handel is locked in a competitive campaign with Democrat Jon Ossoff for a vacant Georgia congressional district that has drawn national attention.

"This afternoon we had some suspicious packages delivered to our house and to our neighbors. The packages contained threatening letters and a suspicious substance. The police were quickly notified and street is now being blocked off. We will continue to coordinate with law enforcement as necessary," Handel said in a statement issued Thursday afternoon.

Democrats are hoping to send a message to President Trump by flipping this Republican-leaning House seat, vacated earlier this year by Tom Price, now Health and Human Services secretary. The contest has drawn a record amount of spending for a House race, possibly as much as $50 million.

On Wednesday, Republican members of Congress practicing for a charity baseball game were shot at by a gunman who had expressed hatred of Republicans and Trump on social media and worked as a campaign volunteer for Vermont Sen. Bernie Sanders' 2016 campaign. House Majority Whip Steve Scalise, who was shot in the hip, remains in the hospital in critical condition.

Ossoff is also claiming to be the victim if of intimidating threats, although he was less specific than Handel in a statement Thursday.

"Our campaign has received a number of threats, some of which have intensified in recent days, and we have reported them to local police as well as taken prudent precautions," he said released about an hour after Handel released her statement.

"These recent events speak to the need for a redoubled commitment to civility and unity," Ossoff continued. "The overwhelming majority of Americans want decent and civil political dialogue, and candidates for office and elected leaders must continue to call for calm and unity, even when there are intense differences of opinion."