Katheria, who is Lok Sabha member from Agra, and MP from Fatehpur Sikri Babu Lal were among the leaders of BJP, VHP and Bajrang Dal who addressed the meeting held on Sunday following the killing of 50-year-old Arun Mahaur, VHP's city vice president.
"This conspiracy that is being hatched against the Hindu community, we have to be be alert to recognise it and strengthen ourselves. We will have to fight it because if we do not do it now, today we have lost one Arun, tomorrow it could be another Arun...the killers should also go, we have to set such an example," Minister of State for HRD Katheria said.
Addressing the gathering, Babu Lal said, "If the Muslims have something in their mind, then draw a line and you will see the strength of the Hindu community".
After the district authorities refused permission for a condolence meeting in Mantola area at the residence of Mahaur, the BJP had shifted the venue to Jaipur House colony, Ramlila ground where Sadhvi Prachi, Katheria along with local MLAs of the party were present.
Authorities have stepped up security in the city which has been gripped by tension following the murder Mauhur while he was returning from a temple on Thursday morning.
Additional companies of police and Rapid Action Force teams have been deployed in Mantola and Nai ki Mandi areas, official sources said.
A close vigil is being kept on the activities of BJP leaders as well as members of other saffron outfits like Bajrang Dal, the sources said.
The police said that one of the accused in the murder case has been arrested while another is absconding.
They said no complaint has been received in connection with alleged inflammatory speeches made at the condolence meeting. "There is no case or complaint," police sources said.
Leaders of the Hindu outfits have demanded firm action against suspects indulging in cow slaughter, and raising of compensation for the family of the deceased.
The state government has announced Rs 15 lakh for the family, but BJP leaders were not satisfied and said that the Dadri lynching victim's kin were given Rs 45 lakh, a house and job.
District authorities have now written to the state government to increase the relief.
'People of Delhi regret making Kejriwal their CM'
JNU row: Police custody of Umar, Anirban extended by 1 day
Trump on retweeting Mussolini: 'It's a very good quote'
BCCI media manager cleared of Conflict of Interest charge
PIX: Priyanka Chopra, at the Oscars!