Gov. Martin O'Malley on Friday morning is expected to announce the terms of a special session to expand gambling in Maryland.

O'Malley will provide an update on the debate over a special session, which would be the second of the summer, with Senate President Thomas V. Mike Miller Jr. and House Speaker Michael Busch in Annapolis at 10 a.m., according to a release from the governor's office.

The governor believes he has secured the 71 votes necessary to guide gambling legislation through the House of Delegates, Busch said after huddling with Democratic leaders in the House.

If a gambling bill, likely to include a sixth casino site to be located in Prince George's County and the authorization of table games at all state casino sites, passed the legislature, the measure would be placed on the November ballot.

Any expansion of gambling must be approved by voters statewide.