BERLIN (Reuters) - A reform of Germany's constitutionally enshrined debt brake, which limits public borrowing, would be discussed by the leaders of the conservatives and the centre-left Social Democrats (SPD) in coalition talks, Chancellor Olaf Scholz said on Monday.

"All sorts of things need to be discussed in this context, with the utmost caution of course," Scholz said at a joint press conference with the leaders of his SPD party.

Scholz added it would be rare for the outgoing parliament to convene again but it would not be the first time.

The far-right Alternative for Germany (AfD) and the Left Party jointly secured one third of seats in the new German lower house of parliament in elections on Sunday, enough to block a loosening of the debt brake, a mechanism some investors and political parties say stymies economic growth.

In the outgoing parliament, major moderate parties would have enough seats to trigger a constitutional reform, which requires at least two thirds of the votes.