Seven marijuana activists were arrested in Washington, D.C. on Thursday while they were handing out free joints to Capitol Hill staffers as part of a campaign to push for laws that would allow D.C. to regulate marijuana.

Three of the activists were charged with possession with intent to distribute, the Capitol police said, while four other people were charged with possession. It is legal to possess, grow and give away small amounts of marijuana in the nation’s capitol, but it is illegal to do so under federal law.

The activists, who are members of marijuana advocacy group DCMJ, had organized an event called the…