NEW DELHI: Two fresh cases of dengue were reported in the Capital on Thursday, taking the total number of people affected by the disease to 67 this season.

"Two more cases of dengue have been reported from the Capital," MCD Municipal Health Officer N K Yadav said.

The spurt in the number of dengue cases has already put the civic authorities on alert and they have issued notices to offices and premises which were found to be acting as breeding grounds for mosquitoes.

The government buildings which have been issued notices include Nirman Bhawan, Shastri Bhawan, Krishi Bhawan and Sena Bhawan, all housing government ministries' offices, including the CPWD, which is responsible for maintaining government offices.

Three hundred premises have also been 'challaned', NDMC (New Delhi Municipal Council) Municipal Health Officer P K Sharma said.

The officials are also blaming the hot and humid weather for the rise in the number of mosquitoes.

"The moisture in the air is creating an atmosphere conducive for breeding of mosquitoes. Usually we see more dengue cases in the end of August and early September.

"Dengue cases start increasing from August and reach their peak in October before declining. Compared to the same period last year, we have more cases this time," an official said.

The MCD has initiated a special sanitation-cum- cleanliness drive in the city this week to get rid of the mosquitoes and it will continue till September 8.