(CNN) -- The death toll from the synchronized bombs that hit the western Indian city of Ahmedabad has risen to at least 37, city police told CNN on Sunday.

Hansa fans her husband Ishwar Bhai, who was injured in Saturday's blasts in Ahmedabad.

The number of injured from the Saturday night attacks also has gone up from 88 to at least 162, they added.

All metropolitan areas in India were on high alert, a day after 17 blasts of low intensity went off within a span of 70 minutes and a 6-mile (10-km) radius in eastern Ahmedabad.

One explosion hit a bus stop, while others detonated at a railway station and on a bus. Several also went off at or near hospitals where the injured were being taken.

Authorities raided an apartment rented by two "foreign nationals" in Mumbai, 338 miles (545 km) away after tracing an e-mail that claimed responsibility for the blasts, CNN's sister network CNN-IBN reported on Sunday.

No arrest has been made, although police reportedly rounded up 30 individuals in connection with the blasts, CNN-IBN added.