The Kerala Police were on alert following reports that four Afghan nationals studying in the state were missing.
Additional Director General of Police (Intelligence) Jacob Punnoose said that police were aware of reports.
"There are 30 students from Afghanistan who came to Kerala last month. Of them, 21 have been admitted to colleges of the Calicut University and nine have registered with the Kerala University," the top police official said.
"The first report surfaced on Sunday when two of the Afghan students studying at the Devagiri College in Kozhikode were found missing. Now we have got information that two more from Thiruvananthapuram, studying for a master's degree, are missing," Punnoose said.
These 30 students are part of the 500 students from Afghanistan who have come to India under a programme of the Indian Council of Cultural Relations (ICCR).
MR Krishnamurthy, regional officer of ICCR, said that out of the 30 students, two students from Kozhikode and one from this state capital had already returned to Afghanistan, as they were unable to adjust to the local conditions.
"Another group of six students from here was granted permission to leave for New Delhi last week. However, we have no idea about the four missing students, because they have not taken any permission from us. Thus, they are deemed to be missing," said Krishnamurthy.
The Kerala police have already issued notices to the airports across the country and all state police headquarters about the missing Afghans.