However, Assam residents are divided on the issue, and many against further migration. "Protests have also been reported in other parts of the country".
Canadian and British governments have also issued similar advisories.
Two people were killed during the protests in Guwahati on Thursday.
The petition said after the coming into force of the CAA an illegal migrant, prosecuted under the Passports (Entry into India) Act, 1920 or the Foreigners Order, 1949, would be prosecuted for being an illegal migrant because he/she didn't belong to one of the exempted religions.
The protests Friday spread to India's eastern state of West Bengal, where protesters torched railway property.
The protesters clashed with police and resorted to arson at several places.
The spokesperson reiterated that this Indian legislation is premised on a falsehood, both with regard to the alleged decline in the non-Muslim population in Pakistan as well as their alleged persecution in the country.
"The Act is unconstitutional.Citizenship Amendment Bill (CAB) will have no place in Kerala and it will not be implemented in the State", Vijayan told reporters.
Many in the far-flung, resource-rich region fear the new legislation will grant citizenship to large numbers of immigrants from neighbouring Bangladesh, who they accuse of stealing jobs and diluting the region's cultural identity.
Opposition parties and civil society members in India criticize the bill as contrary to secular principles enshrined in India's constitution as it excludes Muslims.
Modi and Japanese counterpart Shinzo Abe postponed a summit that reportedly was due to be held in Guwahati from Sunday, and the United States and Britain warned their nationals to "exercise caution" if travelling to the wider northeast region.
The organisations equated the CAA with the two-nation theory for introducing a distinction between Muslims and non-Muslims for the purposes of granting exemption for citizenship by naturalisation.