He also said the government will undertake a senitisation exercise to deal with the issue.
Asserting that the government was firmly committed that such incidents "cannot be forgotten", Singh said that Lt Governor of Delhi Najeeb Jung has assured that he will see to it that the case gets daily hearing to ensure speedy justice.
Singh said the envoys felt the government's actions are very sincere and that's why despite whatever was being said they were present for the Africa Day event organised by ICCR.
"Immediate action was taken. Two people were nabbed, one is on the run and the police has assured us that he will be nabbed soon.
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"The Lt Governor has assured us that he is going to press for daily hearings so that we can finish this case as fast as possible," Singh said.
He said the incident was a one-off incident and not racially motivated.
"This is a one-off incident and not a racially motivated incident. I gave an example of the dentist who was killed (in Delhi). He was playing with his child. Somehow lot of things are happening in Delhi which show absolute intolerance. People are not willing to have something which is peaceful resolution. I won't go beyond that," he added.
He also said the Indian community staying in Africa, particularly in Congo, "has been told that they need to be careful".
"Any anger outside is natural. They have lost a child.
There would be many who feed to a larger number of people. You have demagogues everywhere," Singh said.
"The commitment of India is that we do not look at these incidents as something which can be forgotten. We want to look at it as an incident that sternly needs to be taken a note of and acted upon," he said.
When asked whether the fear in the African community is legitimate, he said if anything happens to any community they are bound to feel threaten.
The minister said the government was concerned over the attacks and added that by and large India is welcome and safe and can be relied upon.
"India is home to African students for a long time. There are large number of students who have risen in the ranks of their country. Some are Presidents today. We value that kind of relationship," he said.