Strikes in Syria: Turks react
The Turkish parliament has authorised troops to go into Syria, if required by the government, in an emergency session.
The decision was taken after Turkey renewed artillery strikes at targets in Syria in response to deadly cross-border shelling on Monday.
Here, BBC News readers react to the escalating situation.
The majority of people getting in touch are worried about the prospects of Turkey engaging in military action.
Pinar Palabiyik, 21, student in Istanbul
People are highly concerned and scared. It doesn't matter which party you support, everyone is worried.
Young men are really concerned that their education will be cut off and they'll be sent to Syria - especially my friends at university and the unemployed between 21 and 29.
There's going to be a massive protest against a cross-border operation to Syria in Taksim Square, Istanbul. The event is expected to have tens of thousands of participants.
I think there will be lots of people from a variety of ages.
The Syrians I know - some students in my university- are really uncomfortable in Turkey and starting to feel very unwelcome.
I don't think anyone is happy - it's impossible to be happy in this situation. They just don't feel safe here anymore.
Ufuk Yigit, 36, accountant in Izmir
We never want to fight with the Syrian people or go to war with them. We have lived with them for centuries.
We believe all of this is the fault of the decisions of our foreign minister.
Lots of people here believe this is the result of failed Turkish foreign politicians; we don't support Prime Minister Tayyip Erdogan.
It really isn't good for Turkey.
We would like to live as European people and we want freedom - we don't want any violence in our country.
Gokhan Guvenc, 51, former journalist in Istanbul
Not only Turkey but people in the whole region have suffered a lot during the Gulf War and the ongoing war between the Turkish security forces and PKK militants.
Turkey is being provoked in order to get involved in this bloody war where the provokers have ulterior motives, other than war.
Turkey is the only remaining country calling for tougher measures, namely military methods.
The majority of the Turkish people who are sick and tired of wars are against another one in the region. Both sides should calm down.
There is an ongoing debate in parliament as to whether to take military action.
Of course this will be accepted - that is to say it will be given the green light by parliament but not necessarily a green light from the Turkish people.
Enough is enough; we've had enough war in this region.
Ozlem Karacaoglu, 32, insurance broker in Istanbul
I know that the people around me are against going to war because if there was a war, of course there will be more casualties. Whereas nothing will happen to the politicians.
A protest has been organized through Facebook and Twitter in Istanbul.
What's happening on the southern border is really chaotic. I'm really sorry for the casualties. However, war would just cause more casualties.
I'm wondering what the consequences of war will be because of course it will affect us all. Everyone knows someone in the army, so we are all concerned.
Firat Cingi, 33, civil engineer in Ankara
The Turkish government justifies action saying that Assad has done some bad things, but Assad has been doing terrible things for years now.
Politics have changed in Turkey over the last three years. Traditionally Turkish politics depended on peace but this has changed after recent problems with Israel, Iraq and now Syria.
Prime Minister Erdogan did wrong by involving us in this matter.
If Obama wants Assad down, then he has to send his marines. Turkish people will not be a subcontractor of the US in Syria.
If Syrian forces come into Turkey and launch an operation, then I will go and fight to defend my country.
But I don't believe this is anything other than a political problem, which must be resolved through politics and not soldiers.
Turkish people don't have problems with its neighbour Syria.
Interviews by Sarah Fowler