Official says ferry was taking Hindu devotees to a temple on the occasion of Mahalaya
The bodies recovered so far included 12 women and eight children, says official
The cause of the accident is unclear
Ferry believed to be carrying nearly 190 people
A tropical storm is expected to make landfall on the southern island of Mindanao
Some 150 people were rescued after the ferry sank on its way to Monywa
Ten vessels and two aircraft are scouring seas for any sign of those missing while families wait anxiously for news