A slipper was hurled at Team Anna members during a public rally in Uttarakhand's Dehradun city on Saturday.
According to reports, Team Anna members Arvind Kejriwal, Kiran Bedi and Manish Sisodiya were present on the stage, when the slipper was thrown.
Team Anna began their election tour from Uttarakhand today.
Kumar Vishwas, a close aide of veteran social activist Anna Hazare, had earlier on Friday made it clear that his team would urge the voters to vote for clean candidates and boycott the corrupt ones.
Vishwas had earlier this month rubbished reports that his team has invited yoga guru Baba Ramdev to campaign in poll-bound Uttarakhand.
The Election Commission had declared that voting in five states, including the most populous Uttar Pradesh would be held between January 28 and March 3.