"I think by the end of the month, certainly, we probably will have a technological solution to this particular issue," Homeland Security Secretary Janet Napolitano was quoted as saying by the Politico.
The Department of Homeland Security is working to fix the bug in the system and till that happens instructions have been issued to the US Customs and Border Protection to "manually check" that the students entering the country have a valid visa.
However, she refrained from giving details of the under what circumstances the alleged suspect succeeded in entering the country even after his visa has expired.
"I wouldn't go so far as to characterise what happened in the light of Boston in terms of materiality or anything of that nature. I think that has to await a fulsome investigation," she said.
"It's surprising that the administration isn't already verifying that any student coming into the country has a valid student visa. What's more concerning is that nearly 12 years after the 9/11 terrorist attacks, we haven't fixed the problems with identifying visa overstays," said Senator Chuck Grassley.
Last week, federal agents were issued directive to verify, "effective immediately," that every foreign student who wants to enter the United States has a valid student visa.