LOS ANGELES (KTLA) -- There could be more protests at Art Walk in downtown Los Angeles Thursday night -- the first time the event is being held since a melee last month.

Members of Occupy Los Angeles clashed with police last month for chalking political slogans on the streets.

Four police officers were injured when the protest got out of hand, and 17 people were arrested.

This time around, visiting demonstrators from Oakland say they are planning chalk murals in solidarity with Occupy L.A.

Leftist activist Cindy Sheehan is also scheduled to visit their group.

Members of an anti-war group called "Code Pink" say they will be there to show their support, with pink chalk in hand.

The LAPD says that its officers are ready to enforce the law if it is being broken.

Meantime, Occupy L.A. organizers are planning a music, art and potluck event at Pershing Square at 7:30 p.m. Thursday.

"Due to the unforeseen circumstances of last month's artwalk, we decided instead of bringing our flavor to artwalk, we would like to invite the community to an open art and music event, in a space we feel could be safer and more comfortable," OLA writes on a Facebook page for the event.

"We also are planning a speak out for victims of last months police brutality, as well as educating the community on their rights, and what to do in case the Police do show up."

OLA says that the gathering will be a "non-violent, peaceful family event" contained to Pershing Square.

"We hope the city can allow us this day to celebrate art and community unobstructed," organizers say.