Light voter turnout is being reported so far today in Westport, where the only primary contests on the ballot are the races for the U.S. Senate nominations in both the Democratic and Republican parties.

Polls are open until 8 p.m.

Election officials reported that about 10 percent of the town's registered voters -- about 1,700 people -- had cast ballots by 4 p.m.

Seeking the Democratic nomination is U.S. Rep. Chris Murphy, the endorsed candidate, who is being challenged by former Secretary of the State Susan Bysiewicz.

The endorsed Republican candidate is Linda McMahon, former executive with World Wrestling Entertainment, who is taken on by former U.S. Rep. Christopher Shays.

The number of registered Democrats in Westport eligible to vote in the primary, as of last week, was 6,117, while the number of voters registered with the GOP eligible to cast ballots in that primary was 4,792.

The town's 6,240 unaffiliated voters and the 29 voters registered with other political parties cannot vote in either primary.

The primary voting will take place at the following Westport polls:

Saugatuck Elementary School gymnasium: Voters who live in the 136-1 and 143 Assembly districts.

Coleytown Middle School gymnasium, 136-2 district.

Long Lots Elementary School gymnasium, 136-3 district.

Greens Farms Elementary School gymnasium, 136-4 district.

Greens Farms Elementary School gymnasium, 136-5 district.

People with questions about their polling station can check "look up" link on the town's website: http://www.westportct.gov/index.aspx?page=670.