According to a senior police officer, the man has been detained and further inquiry is underway.
The objects were promotional balloons filled with gas, launched by the event management company to advertise its client.
Voting for the Delhi Assembly elections began on Wednesday, with prominent leaders like President Droupadi Murmu, Union ministers S Jaishankar and Hardeep Singh Puri, Congress leader Rahul Gandhi, and Delhi Chief Minister Atishi casting their ballots early in the day. Other notable figures who participated in the electoral process included Lieutenant Governor V K Saxena, Chief Election Commissioner Rajiv Kumar, AAP leader and former Delhi deputy chief minister Manish Sisodia, Delhi BJP president Virendra Sachdeva, Delhi Police Commissioner Sanjay Arora, and Delhi Chief Electoral Officer R Alice Vaz. The election is a triangular contest between the ruling AAP, BJP, and Congress, with the AAP aiming for a third consecutive term. Polling is underway at 13,766 stations across Delhi's 70 assembly constituencies to decide the fate of 699 candidates. The results will be announced on February 8.
Mumbai assistant police inspector Riyaz Kazi, a colleague of police officer Sachin Waze, was suspended from service on Monday, a day after he was arrested by the NIA probing the recovery of an explosives-laden SUV found outside industrialist Mukesh Ambani's residence in Mumbai and the subsequent murder of Mansukh Hiran, an official said.
Delhi Chief Minister Arvind Kejriwal on Monday urged Lieutenant Governor V K Saxena to take strict action over the murder of a minor girl in Shahbad Dairy in Delhi and said it was his responsibility to maintain law and order in the city.
The Brihanmumbai Municipal Corporation initiated an inspection drive of 624 restaurants, eateries and malls across the city and its suburbs and razed illegal, unauthorised structures at 314 sites.
In the third reshuffle since coming to power, Prime Minister Modi raised the strength of his Council of Ministers from 73 to 76.